The worst part of the second gen cars in terms of rear tire clearance (well, at least the 70-73 Camaros, I'd guess the same for the others) lies in two places: One, the forward inner "bump" on the lower inner wheel tubs (as in stock) sucks. Hard to describe, it's the feature on the lower, innner part of the stock inners, and needs to go bye-bye. Not a big deal, at all, no sweat really, takes ten minutes to mend while doing a tubber job, which is pretty easy using the stock inner fenderwells. The other issue is the OUTER tub, and more specifically, the way the body line/outer wheel house runs inward, it's not terribly fun either, not much room outboard in bump travel. No sweat either way, we have two 70 Camaros in shop with a simple mini-tub that allow a 335 rear tire to fit, without having to jack the car up like a 4x4 (disclaimer: both cars use our 3-Link Rear Suspension setup which enables the tires to fit). I can't speak to the Air setup, but I can state that with leafs, you'd need to relocate the forward pivots, ala DSE. No issue with our 3-Link kit for those looking for a step "up," but utilizing the stock forward leaf pickups for most/any application could/will limit you to inner tire clearance.
Second gen's rock, the cars are so far above most other muscle cars in terms of performance potential, they will without any question become FAR more popular very soon. All it takes is a few smart, but simple mods.
Mark
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