EQ Heads and stock rocker arms?
Hmm, lots of good info. I was thinking the cam was a bit on the conservative side as well but it will be primarily street setup and has power brakes if that makes any difference here. I really like the idea of a 50mph rolling burnout tho haha.
The pistons will be the magnum stockers, I am trying to get away without digging into the bottom end too much.
Also already picked up a kevko oil pan / pickup with a new standard volume oil pump.
As for gears I am running an 8.75 with 3.55 gears and a trutrac diff. Also currently I think a 2200 stall on a beefed up 904 I was hoping to keep. Tires are BFG Sport comp2 245/45/17 that grip pretty well with the current 318 (hoping the magnum will overpower them though haha).
Well everything, IMO, is gonna hinge on your compression ratio.
A fast-rate 223ish roller cam with a decent Dcr will annihilate 245s. Also, again with a decent Dcr, the 2200 that is currently behind the 318, and is in fact a 2200 there, it will be fine for your stated useage. And the 3.55s will be just right.
But if your compression sags into the basement, then all bets are off!
8.8. Then, if you cannot get into the range of .030 t .045 in Quench, you better take off another .2 so now 8.6. And if you want to run on 89, then take off another .2; so now 8.4 maxDcr. But to do this, you may have to be a sharp tuner, to get the timing curve just right, and to get the carb into the ballpark. If you just want to slam the dizzy in there and drive, then you better take off another .2; so now 8.2 is maxDcr.
Then we talk about altitude.......
If the car is gonna see altitude changes over 1000 ft, Then the higher you go the more Dcr you are gonna need to maintain power. So then the Dcr has to climb back up, and then at sealevel you have to run 91.
See what I mean, it all depends on your assembled and measured Static compression ratio.
So If you just wanna drive, then,Choose a conservative Dcr, like 7.8 to 8.2, and put whatever cam in there that makes the number.
And remember this; compression cannot start until the intake closes. The bigger the cam, the later the intake closes, and the lower the Dcr goes. And when the Dcr gets too low, the engine starts to give up low-speed torque. And you will feel it almost rightaway.
Just 4 degrees is "feel-able"! To undo this laziness, once it is all assembled, the answer is a higher stall TC, to let the engine spool up to a higher torque number.
So you can spend the money on compression, or you can spend it on bandaids, after the fact. So before you order up a cam, get the compression figured out. Measure, measure,measure.
As to power brakes, my 1973Dart booster worked just fine with the 2430 .
