Yeah, I'm not quite sure why that particular link always draws the "FTE auto red flag" but it must have gotten cleared early this morning. There's a lot of good info there.

Here's a really good site for your T-5 as well - lots of different gearing options there!

TREMEC T5 Transmission -Modern Driveline


Josh that sounds like a great combination. I have a C6 which is 1.0 in third. I'm running 15" tires on the back and the 9 3/8 rear I have (WDT-F) is a 2.80 with 31 splines. It fits perfect in the 51!

I'm doing 65 MPH at 2350 rpm. So, I would think you could find something right around the 3.25 and that would be perfect for you (considering a 26" tire diameter or 81 inch roll out) for a 16" rear tire you might get away with a 3.50.

Here is the link of the calculator I used - and it is right on the money!

Gear Ratio Calculator

Have fun!