I am looking for the specs of a weld prostar that is either 7" or 8" wide to accept a street tire on a 95 camaro. Also will you still need a spacer?

 

Yes, you will need a spacer. The interference is on the brake caliper, so it doesn't really matter what width and what offset you get..... the "disc" (as opposed to the "rim") is still sitting against the caliper spring and the horizontal bar on the steering knuckle that supports the caliper.

With a 7" wide wheel, you are going to want a 4.5" backspace, and with an 8" wide wheel use 5.5" backspace. They outside edge of the tire should be located toward the outside edge of the fender.

 

So if I want to use a 7" wheel, I need prostars with a 4.5" backspace and a 5/16 spacer? What make of spacer do you use and what wheel studs do you use?

 

I have a generic 5/16" spacer... I have no idea who made it. The studs are 2.67" (plus unthreaded end) from Lingenfelter. The studs are just barely NHRA legal, and they end inside the Weld lugs, but they do meet the requirement for 12mm of thread engagement in the hex portion on a 12mm stud.