Nova stuff is different unless it's 75 and newer. Tubular arms should be plentiful as that subframe was a favorite of stock car builders for over 20 years..A body should be the same from 73-77 as well.. The steering boxes are similar on the 82-92 F body but you will probably have to change the pitman arm..As I recall if you want a quicker box the A body buick was the best one..