gene, "when we were young.........." . geeze, when was that ? i forget.... you hit it on the head when you said about writing a book. we should have done just that ! back in the early 70's , i had a junk yard and could have told almost any one what would fit what, and there were many times the hollander was wrong ! today, if i didn't have the different "master catalogs", parts books, and a few hollanders, i couldn't tell if my socks would fit my feet ! i just wished there were a way we could impart our vast experiances into a base that could be accessed for future reference. and you are spot on with the taper and hole sizes. i have physically compared many part numbers, but as you know, there are a huge bunch out there that i haven't. and at this stage of the game, i'm like you. if i know for sure, or can give an educated guess, i'll try to help out if i can. keep up the good work !