I am not well educated on the 65's and cant say as to any possible Hemis,
so , other than that , only two examples of rare AND extremely valuable come to mind . The 1970 300 Hurst convertibles , and the 1970 Sport Fury GT 440+6 . A nice example of either one could fetch some serious money from the right collector . If a guy had deep pockets and wanted to collect one example of each of Plymouth's Rapid Transit System from 1970, he's going to need a
Sport Fury GT, and of course the 440+6 would be the one to get. Problem is, just try to find one . They built what , about 61 or so ? but only about ten known to exist on planet earth right now , and about 7 or 8 of those are basket cases..Probably one of the most under valued and under appreciated cars in the world of Mopars.
And while we are on the subject, people, please stop calling Plymouths 'six packs' that's a Dodge only term . We call Plymouths "Six Barrels" .

Greg