Quick wheel question.

best idea is to get your wheels and tires first, then measure up and narrow to fit.
When I went through this in 99, 15x10s were 4.5 bs, to run 295s.I narrowed an extra 1/4 per side, just in case. Glad I did cause I needed it, for the 325s. Better to be a bit narrow than a bit wide. Too wide you are fubarred. Too narrow, you can add spacers.
I run 325/50s on the track, 295/50 on 4.5bs on the street. 68 Bcuda,.oem tubs, 3/4 offset hangers,stockish ride height at the sills, no rubbing, some massaging/trimming, axle relocated rearward about 1/2 inch.325s are a tic under 28.