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It will have the spool style mounts, possibly disc brakes, and it will have the big bolt pattern



Nope, if its got drums it'll still be small bolt. The k-member is no more heavy duty, but the mounts are better. It'll still be a slant six k-member so you'll be no closer to putting a V8 in. you either need a V8 k-member, Schumacher mounts, or build your own.