Trying to save a ‘66 Barracuda

Total nub, so please be patient with me? I located a ‘66 Barracuda that needs an entire radiator core support. Unfortunately, the car was attacked pretty hard as a parts car at some point but I feel sorry for it, its cheap, and don’t want to see it go to the fish cannery so I’d like to grab it and try to do something with it. I am not totally interested in drop dead originality, so will any post ‘67 A body core fit with no or only basic modification? 70s Valiants, Darts, and Dusters are much easier to find parts from around here, if they will fit. Anything specific I need to have in mind when hunting down and chopping out a used support? I know there were some radiator size differences but not what I’d need? The plan would be to run a 225 and a 904 and to eventually build a decent looking driver out of it; but a beat around “rolling project“ until then. Did the 904s physically change much through the ‘70s or will pretty much any bolt in? Finally, any specific 70s drive shafts to be on the look out for that will fall right in there or am I looking at having a new one made or tracking one from another ‘66 Barracuda? I am unclear on the rules yet. Thanks for your help!