Another 69 Camaro tire fitment Question

[67Rally]

Keep your offset as close to +6mm on a first gen as possible and that should center the wheel between the subframe/fender and the frame rail/quarter panel as possible.

Ideal backspacing for maximum clearance is as follows:

17x7 = 4.25"bs
17x8 = 4.75"bs
17x8.5 = 5" bs
17x9 = 5.25"bs
17x9.5 = 5.5" bs

Wheel diameter is irrelevant, it's the same for any 17"/18"/19" wheel.