Back space help please!!

33IMP said
All of the extra width of the 8" wheel is to the inside, compared to the 7" wheel.
So, the outside fender clearance should be identical between the 7 and 8, with more room to the inside to the spring with the seven.... assuming the same size tire.
So, if the tire on the eight fits, same size tire on the seven will also fit.
Click to expand...
nope, you need to look at the wheel mount face. the 8" (bead seat to bead seat width, 9" overall width), 4.5 backspace wheel in 0 offset.
the 7" (bead seat to bead seat, 8" overall width) with 3.5" backspace is -1/2" offset (0 offset would be 4" BS). that will push the outside of the tire outboard 1/2" give or take.