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Autozone shows them to be different part numbers, so I'd order the '77 set. Kind of surprised me. Are you using '77 or '70 I-beams, just out of curiosity?
I have 1970 I-Beams with 1970 drums and thanks for the tip. I like ur truck i have a 1970 Ford F-100 Custom Sport long bed with a 240 6 cylinder and 3 on the tree lol I am making a street truck out of it just a touch of power and looks later Austin