4:10 or 4:30 gears for me

[Ieatcamaros]

I don't use any of the formulas online, I have my own. I have it on a spreadsheet if anyone is interested in it. I got 100 rpm difference in what crazypete posted. At 65, I got 3495. At 75, I got 4032 RPM. Not enough difference to matter, but it is the sole reason I use my own formula. Your rpm's at 68 mph(65-70) with a 4.10 gear is 3656. If you want to drive the car on the street but optimize at the track, I would go with 4.10's since you are going to be putting in an 8.8 anyway. Me, I would put 4.30's in and trailer it to the track. You got your 88gt for the street. IMO, your only other option (besides the high rpm's on the highway) would be to get a 4.56'd 8.8 and put a lentech aod in. That would be the SH1T!