i found a set of 15X8 welds on cragslist for pretty cheap but im not sure if they will fit. the bolt pattern of the rim is correct (5 x 4.5), but the welds only have a 3.5 inch backspace. that seems kind of shallow to me. i drive a lowered 91 gt with 5 lug conversion sn95 front spindles and ranger axles. any help would be great.