It does have the 2 plugs on the side. It does have the "footprint" indentation in the pan. It is a short shaft. The tag is sort of worn, what follows is the best I can do. bottom of tag; BA-67-?6?-7630 (can't get the middle 2 numbers) top of tag; 388 This may not be enough info, but let me know if this clues anyone into what it is.
Take a look at the front pump and the input shaft. With a SP, the stator splines are 1/2" as opposed to the fixed pitch where they are 1". The SP in also has a oil feed hole near the stator splines. The 67 BA was a 67 GS400 trans. It should be a SP, everything you posted points that way.
