Your '75 suspension is really too wide to look right under an AD. You can try wheels with lots of negative offset, but you are going to find the fronts stick out a ways.
That said, why not just widen the fenders all the way around? I've seen where someone cut the fenders lengthwise and grafted one or two inches in and welded it back together.
Another approach would be to take two complete sets of fenders, and again cut each fender lengthwise, but being careful to offset the cuts so when you combined the inside portion of one fender with the outside of another you have increased the width by the desired amount.
It probably sounds crazy, but I'm considering that exact approach to widen fenders on one of mine. Its also a way to get use out of fenders with a bad lip or small dent that could be eliminated.
