Great looking car! I see you stuck with the 5.75" BS even though your wheels are a little narrower than the 10" Ridetech says will fit with that BS and the Tru-turn set-up on stock subframe. Even though you are still running 275/35/18 tires, do you think this gave you a little more clearance so you don't have rubbing issues? I'm trying to decide on rim width and BS at the moment and don't want to push the limits to much and then find out I have to modify my fenders. I'll thinking about either 9" - 9.5" wide in the front with 265/35/18.
What tire size are you running on the rear and is the backspacing 6"? I know your rims are 18x12 but didn't see any tire size or BS. I'm looking at 19's for the rear and debating on 11" - 12" as I want to run a 325/30/19 tire. Just looking for help to determine what will fit with as little problems as possible on my 69 Firebird. Obviously a shortened rear end will be needed, but not sure if i'll go with a floater. I'm also running the RT air set up for the exact reason you can see in your photos!