72 340 Duster Wheels

To answer your bolt pattern question, 72 was the last year for SBP on A-body cars. Your 72 340 Duster (VS29H2) should have SBP wheels, just like mine came with. Wheel Vintiques is another source for bigger and wider rally wheels. Check them out. On trim rings, you'll probably have to look to the General (GM) for a trim ring wider than six inches. Maybe a Corvette rally trim ring. On backspacing, you'll probably be limited to 4 1/4 to 4 1/2 inches, depending on the tire you choose. Be thankful it's not a Dodge, as they have smaller wheelhouses than Plymouths. Hope this helps!