Author Topic: 71 challenger build date  (Read 1945 times)

Offline pnypwr

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71 challenger build date
« on: November 03, 2018 - 11:32:06 pm »
So I bought a 71 challenger 383 car. The genius I got it from lost the fender tag. Fortunately I have 1 decent sheet and 1/2 of another.  In my state I need 2 vin numbers to reg the dash and door.  Well he sandblasted the car and door so my sticker is long gone. So to have a door sticker made I need the build date which is on the build sheet except that line with the date and  order numbers missing. The second sheet has black overspray on it and isnt readable. The last 6 of the vin is 2843xx my research leads me to think its built around the end of Jan or early feb of 71: anyone have a close sequential its a hamtramack car...thanks




Offline 70chall440

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Re: 71 challenger build date
« Reply #1 on: November 03, 2018 - 11:43:01 pm »
Can you use the last 8 of the vin on cowl and radiator support for your registration?
Current Mopar
70 Challenger RT 440-6, 73 Cuda (under const)
05 Durango, 99 Dakota, 01 Ram 4x4, 14 2500 4X4, 10 PCP Challenger RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR, 61 Jeep FC170
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline Beekeeper

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Re: 71 challenger build date
« Reply #2 on: November 04, 2018 - 10:14:37 am »
I had a company make me a door sticker and they only wanted a copy of something with a vin number like the dash vin or build sheet to verify I wasnt doing anything shady. I think the company was called ECS but Id have to do a little digging to verify. I would go with your research and just have the sticker made with your best build month estimate. This would then allow you to get it registered. If new information came up later that changed the build month, you could always have a new sticker made if it was that important to you.

In Ca, a car like yours would be vin verified which would mean it gets inspected all over and if the inspector believed it was authentic, then it gets signed off. Ive gone through that process out here several times and had only a dash vin plate and partial body stamping used to verify. Fender tags, door stickers, and build sheets are frequently missing. Which state are you in that makes the process more difficult?

Offline 70chall440

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Re: 71 challenger build date
« Reply #3 on: November 04, 2018 - 11:47:25 am »
I was thinking about this and seems odd to me that a state would accept a sticker that can be reproduced as evidence of the VIN. It would seem that the Dash, Cowl and Radiator core support would validate the VIN/car.
Current Mopar
70 Challenger RT 440-6, 73 Cuda (under const)
05 Durango, 99 Dakota, 01 Ram 4x4, 14 2500 4X4, 10 PCP Challenger RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR, 61 Jeep FC170
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline Beekeeper

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Re: 71 challenger build date
« Reply #4 on: November 04, 2018 - 01:23:29 pm »
I was thinking about this and seems odd to me that a state would accept a sticker that can be reproduced as evidence of the VIN. It would seem that the Dash, Cowl and Radiator core support would validate the VIN/car.

I agree. A sticker would mean little to me if I was doing the validation unless it was obvious that it had been in place for decades.

Offline pnypwr

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Re: 71 challenger build date
« Reply #5 on: November 04, 2018 - 05:26:38 pm »
Im in ct they do silly things I asked what was needed they said dash and door...exs does the door stickers Id just like it to be right. The car needs a cowl I think I can save the cap and rad supports a twisted mess from him moving it with a tractor so they might get changed but I prob should get it tagged before I cut it up...so anyone got a 71 with a close vin?

Offline Beekeeper

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Re: 71 challenger build date
« Reply #6 on: November 04, 2018 - 05:53:23 pm »
Im in ct they do silly things I asked what was needed they said dash and door...exs does the door stickers Id just like it to be right. The car needs a cowl I think I can save the cap and rad supports a twisted mess from him moving it with a tractor so they might get changed but I prob should get it tagged before I cut it up...so anyone got a 71 with a close vin?

So one of my 70 challengers is a Hamtrack car and the sequence number is 164124. It was built on October 21. I could see February being about right.

By the way, I changed a cowl on a different car and I transplanted the vin stamping into the new cowl. It took me a couple hours to carefully cut out the old piece and graft it into the new cowl. I spent a lot of time smoothing out the front and back side welds so that the transfer was undetectable by look or feel. Although I would never hide this if I sold the car, I am glad I took the time and effort to do it.

Offline 70chall440

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Re: 71 challenger build date
« Reply #7 on: November 04, 2018 - 06:05:35 pm »
To be clear, in no way was I saying or implying anything negative on your part, just struck me as odd they (a state entity) would accept a door sticker.

To the issue at hand, I tried for a long time to determine an approximately build date (as in the actual day) my 70 was built. I do have the door sticker so I know the month, but was trying to figure out the day. I reached out to a number of restoration guys and there are a few who specialize in this and by all accounts can get pretty close if not exact. Unfortunately unless you are paying them to restore your car, they don't seem to want to help. Eventually there is some black magic going on there and they don't want to give away any secrets. Some will cite legal reasons such as not wanting people to replicate fender tags or worse build sheets, but I am not convinced this is the reason.

I have no idea how the VIN numbers were generated or if they were sequential year to year but my 70 is a LA car number 109573 built 10/69

Bottom line is that I think you are going to have to do some detective work on your own to try and reach any semblance of an answer. Have you researched any 71 registries? I realize you started here and I hope that yields you some results. 
Current Mopar
70 Challenger RT 440-6, 73 Cuda (under const)
05 Durango, 99 Dakota, 01 Ram 4x4, 14 2500 4X4, 10 PCP Challenger RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR, 61 Jeep FC170
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline Beekeeper

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Re: 71 challenger build date
« Reply #8 on: November 04, 2018 - 07:08:13 pm »
The way it has been explained to me is this:

Each plant started at 100001 and went forward from there but they were not necessarily built in exact sequence day by day. To further complicate things, each plant built more than just one model of car so the vin numbers included a mixture of everything they produced at that factory be it Darts or Challengers. So for instance, one of my Challengers from the LA plant has a number of 100772 but that doesnt mean it was the 772nd Challenger that factory cranked out. While you could conclude it was built very early in the production, there is no guarantee it was built after 100771 or before 100773. It might have been built days or weeks before or after a car with a vin only one number off. Safe to say though that 100772 was not built six months into the production run that year.

I did a ton of research on this exact thing for a car once, collecting pictures of hundreds of car fender tags from the same plant looking to make sense of it all and narrow down an exact build date. Everything I found fit with exactly what I just described. I found nothing outside of this that we could call an anomaly. In the end, the closest I could get that Id be willing to make a bet on was plus or minus a week.

I think one of the tricks the pros probably rely on is looking at date codes of the other original parts on the car. In a lot of cases, parts will be dated a couple months prior to the build date of a car and it makes sense that it takes time to get all the little pieces produced and ready prior to final assembly. I would look at dates codes of as much as you could find, writing it all down and looking for common date periods. If most everything dates to December, Id put your build date in February.

One final thought would be that since no records exist, theres no way for someone to call you a liar. Truthfully, you could drive yourself crazy over analyzing stuff like that and who really cares if it isnt a hemi car?

Offline 70chall440

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Re: 71 challenger build date
« Reply #9 on: November 04, 2018 - 09:02:04 pm »
Beekeeper,

I have been told the same thing as you just explained (excellent explanation by the way). I completely agree with your recommendation.
Current Mopar
70 Challenger RT 440-6, 73 Cuda (under const)
05 Durango, 99 Dakota, 01 Ram 4x4, 14 2500 4X4, 10 PCP Challenger RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR, 61 Jeep FC170
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline Beekeeper

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Re: 71 challenger build date
« Reply #10 on: November 04, 2018 - 09:22:58 pm »
Beekeeper,

I have been told the same thing as you just explained (excellent explanation by the way). I completely agree with your recommendation.

Thanks...I got bored at work today...haha

Offline 70chall440

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Re: 71 challenger build date
« Reply #11 on: November 04, 2018 - 10:01:28 pm »
I know that feeling, although I don't work any longer (semi retired).
Current Mopar
70 Challenger RT 440-6, 73 Cuda (under const)
05 Durango, 99 Dakota, 01 Ram 4x4, 14 2500 4X4, 10 PCP Challenger RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR, 61 Jeep FC170
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)