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Old 24-07-2017, 06:11 PM
Shan Shan is offline
Join Date: Apr 2017
Location: VIC
Posts: 57
Well I think that settles it.

These old cars can all vary slightly, BUT general consensus appears to be:

FRONT - 2" drop, 18x8, with 4.75" Backspace is good and allows for tyre options 245/40 and smaller
I also know 225/40/18 works with a 2" drop and right backspace from my experience with my 68 Firebird.

REAR - 2.5" drop, 18x9.5, with 5.5 backspace.
Some people have fit 275/40, but lowering is likely to scrub with this sizing.
I have run 3" drop with rolled guards on the firebird with the 275/40 and found them too big, but seems others have had more success. A 265/40 will give you fewer troubles, but I suspect guard may still need to be rolled.

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