Thanks for the reply guys..I never really thought it would go 5's just by changing heads...only reason I ask is I see other people on here with motors similar to mine with good heads running much faster ..plus,like I said only made 4 passes, So have not done any playing with timing and so forth. The car leaves hard and pulls hard the first half of the track but it really seemed to nose over on top when I took it to 6800...I have been told I am running too much timing for a big block (38 total distributor locked out). I just thought it was nosing over because it has stock factory heads on a relatively large engine(compared to the factory BBC).
I haven't decided for sure which heads to get...as far as intake port size. The cost difference between the various AFR heads is trivial. On one hand I think I should get the 345 or 357 but on the other hand I am afraid I will go too big and hurt the short times too much. I don't want to take this thing past 6800 or so .I will also change the intake to a Dart or a Super Victor and I am not against a camshaft swap if I thought it would pick it up some.
I haven't checked the stall..to be honest I actually forgot to look.I do leave flat against the converter with the trans brake...but I don't mash the throttle until just before I release it because this is a bottom bulb car with no delay box.The converter is an 8" Coan that I had built for a 14.1 454 that I had in the car with the same heads and intake. Cam was a .714 lift Comp cams roller with dur @ .050 262/ 272 with a 108 LSA. I did dead head the converter with that engine one time and it stalled at 5200 with the transbrake. I called Coan before I put it behind this engine to see if the converter could be modified for this combonation..I gave them my engine specs.He told me to try it as is and see how it did. The car ran 6.50's with the old engine and the 60' were always around 1.43 - 1.46 and MPH was 104....I thought that 80 more cubic inches would have picked it up more than 3 tenths.