Is the stock gears 3:55 in the cars? I may swap housings with someone then.
I have an Auto with 4:10's and cant wait to put a 3:55 back in.
had 410s. It got old. I have 3.27s now with an iron IRS housing and love them. Plan on POSI or a whipple. Plus Im averaging 23-25mpg with the 327s. With 410s I was down to 16 mpg average at one point. Unless this is an all out drag car I wouldn't go more than 373s. Really depends on mods and what you plan to do with the car.