You must have a pretty mismatched combo. My 67 Barracuda HT with 915 heads that I ported, 265 @.050 with .620 lift cam, 4.30 gears and 28X10 MT slicks and a 4200 stall converter ran between 6.99 and 7.04 at 95MPH in the 1/8 Maybe you don't have enough compression. What is your 60' time? Maybe I am comparing apples to oranges if the red PU is you car. Anyway I would think that with the stall you have it should be 1.65 or less 60' if it has bite and torque.