Thanks Josh. Joanne @ Callaway told me they "thought" they were 17x9.5, so that is why I'm trying to confirm. I didn't know the Dymags were different.Im pretty sure the OZ wheels were 17x9.5 like the stockers. The dymags were 17x10
yes, if you go 17x9.5 the offset will be the same. If you wider on the rear (which I doubt you will based on our conversations ) it will be different. If you look at a higher end wheel like an HRE, CCW etc...all you have to do is tell them you have a 91 Corvette and they can build wheels to fit the car. I believe 56mm is the correct offset.
What was the standard wheel size for a '91? The model center shows 17x9.5 for the 1990, was it the same? Was it the same front/rear also?