here is how you used to be able to do engine swaps, up until the early 70s or thereabouts--just call up TransDapt and order a bellhousing to fit any engine and any manual transmission! The adapter part number consists of two letters and the number. The letters match the engine, the numbers match the trans. See the notes for more info about each particular engine/trans sorry for the fuzziness, and be sure to thank Canuck for the catalog scan
Thank you for posting this info. You identifed the mystery adapter. Early small block Ford to "flathead" tranny. Dan