Thanks......... I'm just building a really stout street driver. I won't be racing it, but I want it there if I need it! The 400 is pushing around 500 horses. Turbo 400 tranny. I was trying to decide between a 3:73 and a 3:55, when I was on the phone with the gear shop, they recommended a 3:42. Basically, I've built a 12 bolt rear end and just wondered if I had a big enough gear.
1968 Firebird 400 Convetible 1977 Firebird Formula
