parts interchangeability ??

Hi Bill,
I'm not sure how changing the words would help here. It's pretty basic - what fits? I know 64 and later - I know nothing about the earlier versions. Which is what I thought I asked. For instance - will the V8 mounts work on the K frame of a car that was not offered with an 8? And so forth. AS I also said - the benefit here was not for me, rather a potential buyer who didn;t seem to have more of a clue than I did. It's all good. Thanks for your thoughts.