I have the numbers written down somewhere on the backspacing it is 6.5" if I remember correctly on an 17"x11". The rims are PS Engineering's Grand Sports (from the 1963 Grand Sports Corvette), I wanted rims to get a vintage racecar look of the 1960 and early 1970's (my 68 Chevelle has Team 3 minilites) and a rim that no one else would have that didn't look so pimp. The car rides a bit on the stiff side but then again it has 600 lb front springs with Bilsteins in all four corners, it right now has B-body front spindles and global west upper control arms, they will be coming off to put the car back to right which doesn't include those WRONG spindles. The rest of the suspension is boxed lower rear arms and adjustable uppers from Edelbrock. Next big thing is to possible put a TKO600 in it, that should be a blast with the 406 SBC and 3.31 posi.