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I read the S10 swaping book by JTR. It says that the stock 7 1/2 rearend won't be able to hold up to big HP V8 motors. The book saysthe 7 5/8 rear will be able to handle the power. I plan on installing a 450hp+ small-block. Is there a way can convert my 7 1/2 to a 7 5/8 rearend? I looked at both rears and I can't tell the differance. They look identical to me. Also does anyone know of any company that sells Ford 9" rears to fit a S10?