backspacing ?
 

Hey guys I'm waiting on some parts to get the rear squared away so I need some help with backspacing for my 78 trans am, its mini tubbed and the 9'' rear I have is 61 11/16'' wide with the rotors included. Thanks Telly

How wide is the stock rearend? How wide do you want to run? I would check with some of the guys running DSE rears on 2nd gens and see how close you are to their overall width because DSE recommends 6.125" backspace on a 12 with their narrowed rears which should get you a good ballpark baseline but typically when you're just cutting a rearend, we always suggest people buy their wheels first because it's a lot easier to mock them up and measure for the rearend than it is to measure for wheels.

Thanks, I'll have to tear down the old rear and measure it!

The stock rear is 60 7/8 so mine is 60 5/8 anybody got any ideas?

I need a little more info from you like wheel size, tire size, if it is a DSE mini tub, etc. Give me a call and I can figure it all out for you.

18x12, 335/30/18, dse mini tubs. thanks