The rims I have,I thought were 7".Inside lips measure 6.5"Rim is stamped 15x6.5"I think from listening to these posts I'm gonna order some cheapie Wheel Vintiques 15x8 (4.5 backspacing)from Summit and call it a day!
I'm very green when it comes to racing,or even t&t @ the track. I don't want the car to feel too squirrely @ the end.
Only bad thing is,I already had 4 of these rims (15x6.5) in perfect condition,no bends or warping,sandblasted,painted black & ready to go!

Thanks for all the replies!
John