If you change your mind and decide, or find an '69, B-body 8 3/4 they're a direct bolt in. On the other hand as far as the 8 1/4's go from 1966 - 1996 difys all have interchangable parts. Just so happens I believe I have 1, but it's a '74 B-body and that's almost 6" longer than what you want.
Maine? Your in Ma.? Why,,,,,,,,,? Just Why,,,,,,? Seriously though That's a very reasonable asking. I'd love to get it, but I just can't make the trip. As,,,,, much as I'd love to, as much as I love them. Thanks for sharing.
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What year engine you trying to do this with? Is / Was this engine a " roller motor " to begin with? Thing about rollers that I was always told is that they spin up faster than old school slugs. But I agree you put slugs with slugs and rollers with rollers.
Got a buddy that bought the car back that I originally bought off him. He's surprised me by doing quite a bit of work on it. I first heard that he wanted to put a 9" ford under it. He doesn't have that much power in it now. He's wanting a lower gear. So I'm trying to help him find a good used...