The T/A's could have the 8" wide wheels from the factory, the Z28's only came with 7". I'd have to check on the backspacing....would a good guess be 4"?
I could post a pic or two of my 81 camaro with 18x8 4.5 bs front and 18x9.5 5.5 bs rears if you'd like. It's not a 70-73 but you may still get an idea of how those sizes look.
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81Z28 protouring project. LQ4, Baer brakes, Global West suspension.
Would love to see them. I'm thinking of 18 X 8" F and 18, 19, or 20 X 10 R for my '79. Jon has a sale of Rushforth wheels that I want to get in on that I really like, but I don't know the backspace yet on my stock 10 bolt with C5 brakes.
Rolling the lip really doesn't help on 2nd gens you will have more of an issue rubbing the outer wheel house than rubbing the lip. Ride height will have an effect on what you can get away with, also what tire brand you use. I know they should be the same no matter what brand you use but Michelins tend to be a little narrower than say Nittos. I have 2 cars with 275/40 -18's on the rear the Nittos are very tight w/ 18x8 4.75 bs and the Michelins are not. The car has been lowered 3" so it limits the front size 18x7 4.5 bs. w/235-40. I have no rubbing on the front a very slight rub in the rear under hard compression of the springs but not enough to damage the tire.
Brian Hobaugh SCCA National Tour June 2014
First Hemi 'Cuda Convertible Ever Built
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