early A-BODY 1-5/8" x 1-3/4" SMALL BLOCK STEP HEADERS

You must have a lot of patience 65cuda340 . If I were to go thur all that I'd contact headman hustler and has them custom make a pair of 1 3/4" fender wells. with No Hassles .
I had a pair of 1 7/8" on my early 65 dart 402 stroker and they fit beautiful. just say n

Yeah, I had fenderwell headers on mine way back. Easy to install, and easy to remove. Did have a tire clearance problem, though, at least on tight turns. After a couple of years, I replaced the inner fenders and went back to hipo 340 manifolds for a long time, then decided, what the hell, and went for the TTI's. I don't regret it, but I'm glad I don't have to do it again.

TTI's on my 67 Barracuda were EASY. I did them with (at the time) one useless arm (since recovered). And everything fit and everything cleared Ha!