Heres mine on 235/55/17 on a 17x8 with 5" backspacing up front and 275/60/17 on a 17x9.5 with 5.5" backspacing out back. 2.5" drop spindles up front with one coil cut and a flip kit out back.
The 8" wides up front fit fine, I see no need for a 7" unless you just want to run a really skinny tire?