John, unless you already have a good 7 1/4 sg (with good clutches) I would not use it. I searched for a few yrs for 7 1/4 parts to build my latest one. Parts are very hard to find, and not inexpensive. I have about $500 in parts in mine 3.91 SG. I ran those rears for many years, with good results, but really not viable choice, today.
