Hey HAMB family. I've seen lots of posts and beautiful photos of the 1937-1938 Buick heavy-duty 3 speed transmission converted to open drive using Oldsmobile tail housings and gears (1951 - 1956 if I'm not mistaken). I am working on a similar conversion with parts from the Pontiac version of this transmission. I am using a 1956/57 Pontiac tail housing, full 1956 Pontiac gear set, and what I believe I've identified as a 1938 Buick case -- no provision for bolt-on bearing retainer. I haven't seen any photos whatsoever of Buick top-shift cases converted with Pontiac parts. So I'm sharing mine. I am using Pontiac parts because I already have the tail housing, and I already have a driveshaft to fit. I am replacing a stock 1957 Pontiac column-shifted transmission behind the 55 287 V8 in my 54 Chieftain.