Transmission ID

I just picked up a spare slant six and complete 3 speed manual transmission. Trying to figure out what exactly I have. It reportedly came out of a 67 Cuda (225 with a 3 on the tree) and was essentially unmolested before the pull. Guy said it ran and drove but when it went on the lift the chassis folded and it became parts.678D034A-E133-4F68-913F-2CD9ED61E98A.png 304E55EF-0AC1-42DF-893C-799DFE6BBC47.png AD92D9C4-6200-49F4-B857-B804BE4D2CDA.png My guess is an A903. It has a slip-in yoke. Is that normal? Any help would be appreciated.