parts interchangeability ??

I've seen the K members of the early early A bodies, and they look nothing like the 63-66 unit! I believe the 63 I had was also different than the 64 units, not a flat bottomed cradle like the 64-66! I don't know much about 62 and earlier except that they didn't come with any V8 option at all!! Sorry I can't be of help here!!