Rear gears with T56

[BigBlockOlds]

Just curious what rear gears everyone is running with a T-56?

I'm building a pro-touring/g-machine '87 Cutlass with a 425 big block Olds, LT1 version T-56 and an 8.5" rear. Just trying to figure what rear gears would work well.

I'll be running it in a few autocross events and would also like to try my hand at a road course or two but it will primarily be a back road fun toy.

Right now I have 3.73's with the TH-2004R trans. I'm looking to go with something in the the 4.10-4.88 range. Question is, how much is too much?

Thanks,