69 chevelle 20's on all 4 corners
 

Just bought this car, going to lower front 2" & the rear 3". On the rear i want to run 20x10 & 305-35 but what backspacing is needed. The front will be 20x8.5 & need to know what tire will fit & the backspacing. A local guy has a set of wheels forsale but I want to make sure I have the correct #'s before buying.

Depending on how deep you want the lip, if I remember correctly, approximately 6".

Whats the backspacing on your wheels. By the way thats a bad ass chevelle you have.