Author Topic: 70 Hemi Road Runner Street Monster build  (Read 3088 times)

Offline 70chall440

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70 Hemi Road Runner Street Monster build
« on: May 23, 2019 - 12:39:57 pm »
Here we go again, beginning the "next" project. This will be a long post I suspect, but I will try and stick to the facts. So let's begin at the beginning with a little history on the car.

My connection with the car began around 2010 when a friend of more that 40 years who lives in ND (I live in WA) contacted me and told me he just bought a 70 RR off eBay. He told me the car was in Medford OR, had recently been painted (EV2), had a tilt front end and was "ready to be built". He could not find a shipper who would pick it up and since I was planning on going to ND that October to attend his daughter's wedding, he was asking if I would get it and bring it out when I came with him paying for fuel. After getting the car I inspected it and realized that while it was shiny it needed everything as there was a lot of "shade tree" things on the car (more on that later). In the end, my buddy didn't want it and told me to sell it, I decided to buy/keep it as the 70 RR is my favorite B body.

The car itself is a LA car, originally a 383, AT, manual steering, manual brake car. Looks to have been brown exterior and creme/brown interior. It appears someone pulled it from a field sometime along the way as it kind of looks like it was a parts car perhaps. It has a funky roll cage in it that screams "stock car". 68 Charger instrument cluster with Tic Tac. They mounted a gas tank in the trunk and mounted a flip lock on the top of the right rear quarter panel "charger style" (why they didn't put it on the drivers side like a Charger is beyond me). The car has a 8.75 with what I believe are 3.91 gears but the the pinion bearing is trashed. They sealed off the trunk from the passenger compartment with a variety of sheet metal which they painted with what looks like POR15. The tilt front end is interesting, well executed but requires 2 bolts to be removed in order to tilt it, however the hood can be opened normally. They removed the inner fender wells and ran tubes from the firewall to the front of the frame rails. These tubes connect to plates that are welded to the firewall and are connected to tubes that connect to the inner sub-frame connectors (stock car magic....). The wiring harness is present but pretty torn up. The trunk floor is toast but the overall body is decent (although I have no idea what is under the paint). The paint was nice but seems that they did not let the primer cure before painting as it has off gassed through the paint creating millions of little craters/bubbles.

Over the years I thought about what to do with it, how to build it, etc. At one point I really wanted to make a Superbird clone out of it but thats cost prohibitive and given it is a real RM car, I decided to just build it as a hotrod. While at a buddys shop we were discussing drive trains and he asked me what I was going to put into it. I stated I would try and find a RV 440 or something but that I needed a 4 spd as that is iconic to me. I laughingly said "it needs a 426 Hemi" but.... He immediately responded that he had all the parts to built a 426; he showed me a 1966 block that had been in a race car and been windowed but repaired and reinstalled then raced, heads, crank, etc. I am a gun guy with deep connections to that industry and he was a budding gun guy so a trade was made. Subsequently, I did some trading with a guy at a machine shop who went through the short block and heads. He sonic checked and magnafluxed the block stating it was good.

My intentions - I intend to keep it basically as it is with the tilt front end, put the Hemi into it with a 833 behind it and of course pistol grip. I am going to install an air grabber hood (have one that will require some work). I will make the air grabber work electrically. I will convert the tilt release to electric. Going to install a stock looking interior, but might make a custom instrument cluster or use a DD version (if I can come up with the $$). I am going to put EFI on it as well and run a factory big oval single 4BBL air cleaner (had to pay like $400 for that).

Follow along, this will not be fast as I am working with a limited budget but there is a lot to do. I did have to order a new exhaust rocker for the engine. Have a Mopar purple Hyd cam for it and some big headers.

Some pictures
« Last Edit: May 23, 2019 - 10:41:40 pm by 70chall440 »
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)




Offline 70chall440

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Re: 70 Hemi Road Runner Street Monster build
« Reply #1 on: May 23, 2019 - 12:41:44 pm »
More pics
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline 70chall440

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Re: 70 Hemi Road Runner Street Monster build
« Reply #2 on: May 23, 2019 - 12:42:29 pm »
I will post more pictures later today, they are all to large right now.
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline 70chall440

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Re: 70 Hemi Road Runner Street Monster build
« Reply #3 on: May 23, 2019 - 09:42:50 pm »
Here are some more
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline 70chall440

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Re: 70 Hemi Road Runner Street Monster build
« Reply #4 on: May 24, 2019 - 01:11:28 pm »
I believe that I am going to paint this one grey however my wife wants it dark blue like a midnight blue. It will be quite a while until I am ready for paint but we will see. Here are a bunch of colors for comparison.
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline 70chall440

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Re: 70 Hemi Road Runner Street Monster build
« Reply #5 on: May 24, 2019 - 01:17:14 pm »
Here is a nice blue one
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline 70chall440

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Re: 70 Hemi Road Runner Street Monster build
« Reply #6 on: May 25, 2019 - 06:43:41 pm »
Some more pictures
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline 70chall440

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Re: 70 Hemi Road Runner Street Monster build
« Reply #7 on: May 26, 2019 - 03:01:05 pm »
I have removed the POS roll cage that was in the car and am convinced that whomever was building the car was a stock car guy. A lot of the work done in the car is very indicative of how dirt track guys build their cars. Its possible that someone was going down that path and then either decided not to finish it or perhaps someone else came around and obtained the car and decided to make a show car / hotrod out of it.

I need to rework the front end, specifically the down tubes there as one is split. My game plan is to install sub frame connectors and torque boxes to stiffen the frame and then set about removing at least one down tube. There are tubes on the inside of the car that connect to the front tubes and are welded to angle iron over the rockers. Once I get the SFC's and torque boxes in, I will cut out the angle iron and tubes as I do not want them in there. Also, once I get the SFC's and torque boxes in I can cut out the trunk floor and repair a couple of spots in the drivers floor pan.
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline 'Cuda Hunter

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Re: 70 Hemi Road Runner Street Monster build
« Reply #8 on: May 27, 2019 - 11:06:44 am »
This is gonna be sweet! 

I actually prefer lime light or hemi orange.  Makes the car really pop! 

"All riches begin as a state of mind and you have complete control of your mind"  -- B. Lee

Offline 70chall440

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Re: 70 Hemi Road Runner Street Monster build
« Reply #9 on: May 27, 2019 - 12:43:44 pm »
I do love hemi orange but I already have a hemi orange 70 challenger. So here is the color pallet I have

- Hemi orange 70 Challenger RT
- lime light 73 Cuda
- Plum Crazy Purple 2010 Challenger RT
- Yellow 01 Viper GTS ACR
- flat black 52 Dodge B3B pickup
- creme 68 Barracuda (this one will probably end up dark blue)

So, if I am going to stick with the high impact colors, doesn't leave much but Sassy Grass or Moulin Rouge (pink) neither of which I am all that excited about. I like the pink actually but thats a lot of pink (I have seen it on B bodies and its a bit much). A guy I knew had a 68 Hemi Road Runner that was a gun metal grey / silver and it really looks killer with black accents such as the hood black outs.

I definitely don't want black, white or red. Blue isn't out but I really wanted to do the 68 in blue.
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline jimynick

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Re: 70 Hemi Road Runner Street Monster build
« Reply #10 on: May 27, 2019 - 11:25:43 pm »
Interesting car Mike! I wonder if a stock car guy was helping a want-to-be drag racer, what with the rear seat closeout and the flip frt end? I like 70 Runners too and the fact that you schwingled a 426 for it just raises the ante! I like the dark grey and if I was going blue, it'd be a dark navy blue, not a royal blue, even though that looks good too. Should be cool when you get done!  :2thumbs:

Offline 70chall440

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Re: 70 Hemi Road Runner Street Monster build
« Reply #11 on: May 28, 2019 - 12:19:00 am »
Thanks for the comments. I agree with you, a dirt track and a drag racer both had something to do with this car at one time or another; perhaps working in concert perhaps separately. I will say that someone with some skill was involved, specifically the body guy. I don't know whats under the paint (don't really want to know  :bigsmile:) but the body work was done pretty well, in particular the charge esk fuel filler on the quarter as well as the fitment of the tilt front end. My initial impressions were that the body guy owed the owner of the car some money or something and did the body work in trade, perhaps free. The reason I say this is that the work where you can see is nice, however the parts you cannot normally see are rough. I think the lower rear quarters are bad, I will strip them working up until I hit good steel; but from what I can see it looks like just the lower parts are bad. The trunk floor will be replaced as it is pretty ratty.

My current game plan is to make it structurally sound but installing some torque boxes and sub frame connectors. Once I have that I can then address the front down tubes and the interior SFC over the rockers and the internal bars.

I got one torque box made and installed on the passenger front corner, I am making them out of 3/16 steel so they should be plenty strong. I had to replace one panel they cut out for some reason on the passenger side (the thing in grey primer), looks like they cut the drivers side but repaired it.

I agree on the color issue, right now dark grey is where my head is at but we are a long way off before I have to decide. 
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline 70chall440

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Re: 70 Hemi Road Runner Street Monster build
« Reply #12 on: May 29, 2019 - 01:49:28 pm »
Didn't get anything done yesterday, had some domestic duties to attend to. I will get back to the torque boxes and SFCs today.

Been thinking about how I am going to deal with the front end, specifically the bracing to bring strength back into it. What I have decided is to add some bars and perhaps a little sheet metal. Here are some simple diagrams that show what I am thinking. This may be modified once I start but I think it will essentially look like this.
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline 70chall440

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Re: 70 Hemi Road Runner Street Monster build
« Reply #13 on: May 30, 2019 - 12:16:59 am »
I managed to get the front torque boxes done and the subframe connectors in. The car is pretty decent structurally and doesn't look like it was ever hit or twisted. I believe it was a parts car at some point, the rearend came from something else (looks like another B body. The E brake cables from the original rearend were cut off and left in the car which points to it being removed for another car. Then whenever someone found it and attempted to ressurect it, they found a rearend from something else (perhaps 68 Charger since the instrument cluster is from one).
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline 70chall440

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Re: 70 Hemi Road Runner Street Monster build
« Reply #14 on: June 01, 2019 - 01:32:21 pm »
I moved on to making the rear torque boxes and managed to get one done so far. As can be seen in the pictures, I made a template which then was transferred over to metal. I could have made these in 3 pieces but elected to do it in 2, a little harder in that the biggest piece has to be bent in a specific way to get it to fit the hole. This would have been much easier if I was using thinner material say 12 gauge) but I am using 3/16 so it has to be persuaded. Not super hard, just takes some patience and tweaking to make fit correctly.

I ordered a pile of engine parts yesterday, specifically I ordered my external oiling system, windage tray, oil pan, etc. a quick $500 or so gone...  :money:

Once I get the torque boxes in I will move to the front end and get that redone, braced, etc. so that I can then move back inside to remove the interior bars and internal rocker subframe connectors. Then it will be on to the trunk floor, lower rockers, etc.
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)