Regarding anybody that has used QA1 front uppers and on lowers on 1964 to 1966 valiant

that's close, but i'd think it would clear thu the range of motion.

i don't want to conflate things, but on my 69 cuda i'm running BBP with a 15X7 with 4.25 BS and 225's and i have *very* little room to the fender lip. granted you might be a little more narrow up front, but i think it's probably a net even with the slab sided fenders of the early car.

ultimately, you'll need to measure the outside just the same as you did in the back. use a floor jack to run it thru the motion to get an idea of where you're at and you can determine what should suit you.

i just don't see it happening with less backspace is all.