what gears 7 1/4

Boy, this is an old thread. Actually, I do have that particular SG unit. I am doing a complete rebuild of the complete rear assy. It is a large bolt pattern "A" body 7 1/4.
I removed the 5.13's, and am installing a new set of 3.91's. Every other part is new, also, except for the spider cross shafts, and actual rear castings.
I don't think you would want to pay, what I have in this rear.