18,000 orig. mile 318 build

Well found out a few days ago that the 8.25 rear i was gunna pick up is now gone. Other than the 8.25 or 8.75 is there any other rear (chevy, ford...) That will swap in with little to no mods? Im a welder so thats not too big of a deal but dont really wanna bother with shortening a rear then having to order rear axles. Now getting one that maybe longer on one side that i can shorten and use two short axles that would be ok but more less looking for a bolt in or close to it swap.