[Alex Denysenko]

Paul, that little clutch assembly was the most worthless POS ever placed behind any V-8.
Leave it to Mopar.
I don't doubt you on some obscure 8.75 in prior 67 A bodies, but I can tell you that I have never seen one. First A body I ever laid eyes on with a 8.75 was a 67 Dart GT 383 4 speed that a friend had bought new. I helped him change the third member using two bumper jacks circa 1969. Boy was I a dumb kid.
Mopar used right and left wheel stud threads through 1969. 1970 they went to all right hand.
Also all A bodies had 7/16 studs like a chebbie through 1969.

Bill, I had to work on them all day long, so I had no desire to work on them in my "fun" time too. Besides, they were just to unreliable.
My employer at the time even offered me a brand new 340 Demon to race at their expense and I declined.

Paul, you are incorrect on the 66 Comet 289/271 Hipo. That engine combo was only available in Mustangs after 1965. Nothing else.