got a 86 gmc pick-up going to put a posi in it full body daily driver before the trans was ripped in half wandering if anyone can tell me why it spun everytime it hit 3800 rpm in the 1/8th still ran an 8.83 @79mph running a 406 ci small block 3.73 gear best 60 ft was a 2.02 can not stall up obviously with only one leg would never leave the line