Thanks. As far as the mount goes, it's also brand new from Brewer's, as is the crossmember. Since the transmission is an early 70's dual shifter mount type, I had to get one of Dan Brewer's crossmembers that has the late 60's bolt holes but the early 70's mount. Kind of a hybrid.
Worked beautifully.
Yep on the u-joints. I reckon I'll replace those just because I don't know how old they are now, even though as you say it doesn't sound like one. No real discernable slop in them, though.
I'll replace the slip yoke too just because.