Sorry Chief, sir, of course I meant 322 and 321. 322 has some personal meaning for my family going back to 68 and the rest will not be spoken about here. I think you can research 321 if you would like, but I believe you have been a forum member long enough to know about that particular piece. Sorry for the typo. No, neither are any different in engineering or function than the other Farmies of their day.