1969 camaro/firebird wheel backspacing

[69firebird19]

Im planning to put on 18s all around ... 18by 8 front 18 by 9 or 9.5 rear....with c5 (kore3) brakes front and rear ...what backspace should i run or am i still ok 4.75 front and 5.5 rear with the c5 brakes

[130fe]

Those backspacings should fit fine, just make sure you use the template off of Tobin's website to see if they will fit whatever wheels you want. Which ones are you looking at?

[69firebird19]

Im still looking...i like the boss 338s but dont have backspace i want.....i liked the tt2 but they wont work unless a spacer.....but the ones that have my attention right now are the boyds smoothie 3....

[MCMLXIX]

The data below is what I've collected. Most didnt say what suspension or brake mods were done to make everything fit.

Front Rim on 1st Gen

17x8 Back Spacing 4.5 Offset 0 245/45/17
17x8 Back Spacing 4.75 Offset +6 235/45/17
17x8 Back Spacing 4.75 Offset +6 235/45/17
18x8 Back Spacing 4.875 ?? 245/40/18
17x7 Back Spacing 4.25 Offset +6 235/47/17
18x8 Back Spacing 5 Offset +13 245/40/18
18x9 Back Spacing 5.5 Offset +13 265/35/18
18x8 Back Spacing 4.5 Offset 0 255/45/18

Rear Rim on 1st Gen

17x9.5 Back Spacing 5.5 Offset +6 275/40/17
17x9.5 Back Spacing 5.5 Offset +6 274/40/17
17x9.5 Back Spacing 5.5 Offset +6 255/45/17
18x10 Back Spacing 5.625 ?? 275/40/18
17x8 Back Spacing 4.5 Offset 0 255/45/17
18x10 Back Spacing 5.75 Offset +6 275/40/18
18x10 Back Spacing 5.5 Offset 0 285/35/18
18x9 Back Spacing 5.5 Offset +13 275/40/18