what rear


i have a G.M. rear, that actually resembles a ford 9 inch, it has a foward loading dropout center section, there is a casting number on the center section, (F778725899gm22) I'm trying to find out what it was in originally and what size ring gear it has, so i can order gears for it. thank you

Mr. Bowtie

John sorry but i do not have any way to reference the number you provided. you might try going to a ring and pinion shop with it they may have a way to reference it for you.

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