I have invested a great amount of time in a Excel file with gear ratios and speeds, tire sizes and more than you want to know.Ok,
I'll stay with 35" tires. I am getting a deal on a 302 engine with AOD (4R70W). My calculations says at 100mph, 4.56 gears and third gear (overdrive off), I'll get about 4300 rpm (2900 with OD). Does that seem right?
I don't know the power curve for the 302 yet (nor the shift points on the transmission). I just want to get a ballpark so I can order the gears.