!!! new best but broke the rearend!!!!

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.