Originally Posted by Bill Verburg

When I post i try to use a standardized setup, 285/30 will be a very small amount shorter, how much depends on the specific tire, so the net gearing will be a small amount shorter.

The big difference between /21 and /31 is in 1 & 2, the /31 is more of a track oriented setup, but I like it for street use too. The taller 1 & 2 gives you shorter drops for 1 - 3

Originally Posted by il pirata

Thanks very much Bill. I am leaning towards /31. Mr. Copans who is going to do the build will give me his perspective...I am leaning towards PMS gears so part of this may be determined by what gearing is available.

Originally Posted by Bill Verburg

You are in great hands!

You don't need them for street use but steel syncros, motorsports bearings and shift forks make for a nice transmission, while in there think about the lsd, a GT 40/60 would be a perfect addition for an open diff, or just update the plate stack w/ GT components if it's already got an lsd

Originally Posted by il pirata

Agree about Copans! Planning on syncros, etc for the transmission. I think we are leaning towards PMS parts for the existing LSD and my intended use but we will see.