[SFfiredog]

The trans you have is from a '74 F-250 or F350 4X4 with either a 360 or 390. The early '70s 3/4 and 1 ton Ford 4X4s had a short tailhousing trans with a short driveshaft leading back to the transfer case which was mounted on it's own crossmember.
This is the shortest tailhousing you will find on a C-6. If you wish to use a standard type slip-yoke tailhousing and output shaft you will need to dissassmeble the trans to replace the output shaft. The good news is all of the parts are interchangeable and should be easy to get and will fit in your trans. I would look for an output shaft and tailhousing from an early '80s thru mid '90s 2wdF-150 thru F-350. Engine size dosen't matter because all (except some big Fords or Lincolns with bolt on yokes) C-6s have the same 31 spline output shaft. You might even still be able to buy these parts new from Ford. If you have to buy a whole trans look for one from a 6.9 or 7.3 diesel. The main case won't do you any good but all of the drums and clutch packs, as well as the servo are bigger and beefier. Transmissions was one of my main responsibilities during my ten years as a Ford dealership wrench.
HTH,
--Mike