Hi rUNCHARGER, and everyone else... More detail...
I have a 70 challenger, 440 4 spd stroked to 505 (440source 512kit) Hyd Roller 560/300
Runs great, but has piston slap like EVERY one of the cars I know with this kit has. Specs have been checked and rechecked. I can't take the sound!
(Apparently it is the 4.25 stroke 4.35 bore in the 440 for some reason. I've heard others don't do it but I ran across this Hemi block so there it is..)
I DEFINITELY want this Hemi NOT to have slap, or as little as possible...
Other problem: I live at 6,000ft, and my 505, while fast, isn't quite good enough up here. ...so I am needing to overcompensate for something...
Oh yeah, the high altitude... Current engine should be around 625hp, but feels more like 525 up here... I NEED (lol) to ramp it up!
This is a street car, and I like torque! I don't care about ET, I just like to scare passengers with neck snapping great throttle response. (3:54 Dana)
So anyway, I need as much street guts and grunt as possible. I thought 572 would help me with my overcompensation, but I 'think' these blocks can not be bored to 4.50. Anybody says otherwise? (I will have it sonic checked). But otherwise, it is already bored and ready at 4.25, so I am thinking budget (on a hemi I know...) 4.25 pistons, 4.5 stroke...
Here is my basic formula I am considering as a final build. Everyone pick it apart please!
4.25 bore, 4.50 stroke
Heads: Edelbrock heads/or INDY SR/ or INDY HiPo ... Will be OUT OF THE BOX bolt on install..
Cam: Please recommend
Carbs/intake: Please recommend
Rocker assy: please recommend
Looking for: in the following order..
1. MAX power on pump gas, like 750hp/tq if I can get it..(remember I lose about 100hp/tq due to altitude!)
2. Budget/bolt on build (yeah I know it is a Hemi but I can spend 35g being fancy. This block probably can't go 4.5, so I am just going to experiment and learn on this one, and it already comes finish bored at 4.25...)
I hope that answers everyone's questions about what I am after.. Thanks everybody!!!
PS, want to sell/swap me that overdone 528 or 572 crank set up you downgraded from for fuel? I have this brand new 4.25 finish bore block sitting here...