no clue what reg. bolt pattern is, thanks

 

4th gen's official bolt pattern is 5x4.75 I believe. That would make the bolt circle around 120mm, so I think they'll fit.

 

120.65 mm / 25.4 mm/inch = 4.75 inches. That's correct for Z and many other Chevys for about 40+ years.

Make sure the center hole is not undersize. The hubs are 2.768 inches I believe for 93 >Camaro. If wheel bore is larger consider using adapter rings to make the wheel "hubcentric".