The 5.72 backspacing is what is run from those that have "found out". It is what it is. Unless your getting some kind of special deal, I'd stick with what works.
not without at least a 3/4" spacer on an A-body rear end. 5.72 bs on the front is fine, but to avoid spacers you would need a B-body rear.
Ideally, a wheel with 4.75 to 5" bs would work on an A-body rear end.