Yeah thats the same as Micks Dart ran, 4.56/31's, he had a 5000 stall, car was on SS springs and good dbl adj shocks, he ran a 950 for quite a while, then a 1050 Dom which picked up around 1 mph and perhaps a 1/10th but he started trapping at 6800+ and the motor threw a rod, (1/2" internal pick-up?), that motor was making around the 596hp mark with Eddy MCH 320cfm heads, he used to say that if he shifted at anything more than 6400 it would slow. I tried to persuade him to try my old CC.650" sft cam that came out my old motor for no money, wouldn't do it, reckon it would've picked up some and gone in the 9's, he was on 10.10's....just some info for ya.