What gear are you running? I ran a 71 446 Scamp with max wedge heads, the mopar J converter, and 4.86 gears. I started with 5.13's but the car actually was quicker with the 4.86. It ran 6.40's and 60 ft'r was 1.38 with 29 x 11.5 slicks.
hi i am running 4.10 gears. my 60 foot is kind of soft for some reasion. but i did not get to do any tunning on it. thinking my converter might be a littl tight for the car. also if it matters this car is not a all out race car and i was running it on 93 pump gas.