3.89 I will probably go to a 4.10 once my current pumpkin wears out. I got a great deal on a take out so the aluminum case, 4.10 tru trac will have to wait. Especially at 1900!
1st on a ls/T56 is 2.66, late model Fbodies responded real well to 4.11s.
I'm runnin a 4.11 in mine with a 9''. It has pretty good mileage on the interstate with the t-56, I would'nt go any less than 3.90 , but I'm running a 275/35/20. Ifr your going with a 26'' tall tire, I would'nt go less than 4.11's, that is if your gonna drive it.
I'm running a 9" with 3.70's and a 26" tire. It's worked great, I have 3500 miles on the car now and really like the way it performs. I haven't been to the strip yet, we'll see how good the Nitto DR's hook and if I wanted a deeper gear, but as of right now, I'm happy with my choice.