c2 corvette
gunmspec,
If you use an aftermarket "offset" trailing arm you can fit an 8" wheel in the rear of a 1963-67 Corvette. The wheel diameter (17" in your case) doesn't matter as much as the diameter / height of the tire. I've seen a 1963 SWC with offset trailing arms fit 20x8 wheels with 225/30R20 (25.5" tall) tires. Many of the resto-mod guys use the stock 245/45R17 (25.7" tall) C5 front tires on the rear of their cars.
This is a huge topic over on the Corvette Forum, may I suggest searching "17 wheel" in the C1-C2 area.
Nick
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