Ok guys, let me put this one to bed. Fred posted a number, Precision #331 back in Aug., long before I found this forum. I ran across his message last night. I’ve been searching every Stovebolt vendor out there and the only one that lists u-joints for my 1950 3600 was, the one Robin mentioned, heavychevy.com . As he also mentioned, their site is kind of confusing but I believe they have them priced at about $25, plus shipping and handling.
Well on a whim this afternoon, I stopped by my local auto parts store with the u-joint and a 6” dial caliper, of course the parts book doesn’t go back that far, but the counterman reached around the corner and the first one he grabbed off the shelf matched up perfectly. Ya want a Number? Precision #331, $15.85, and no shipping or handling. I asked him what that u-joint was used on and he said all the ¾ ton Chevy’s.
So there it is, definitive answer. Why none of our vendors list them in their catalogs is a mystery to me. They seem to be able to supply the center bearing and rubber just fine. And they also seem to have the $200 front joint.
Denny Graham
Sandwich, IL

Denny G
Sandwich, IL