Wheel Vintique's 15x7 rallyes are 4.25" and their 15x8 rallyes are 4.5". Now that we've figured that out, should I use 4.25" or 4.5" backspacing on a 15x8 if I want to fit some 275/60/15's on the rear. When I checked and measured it looked like the 4.25" BS would allow about 3/8" from tire to leaf spring. That means the 4.5" puts the tire pretty darn close to the spring. As far as the quarter lip goes, it doesn/t look like a problem with either one (4.25 or 4.5). It would be nice to get as much room as possible there however. I'd like to hear from some people that have actually tried this same setup on their Cuda (stock rearend).
