I plan to install an early 80s MY6 transmission in my 54 pickup with a 235. These units came with three (at least) different bolt patterns for attaching to the bellhousing. Mine is known as the hybrid pattern ---see photo. The first major question is will I need another bellhousing or will an adapter plate be sufficient? I used one of these units with a standard Muncie bolt pattern behind a 350 truck engine, and it was a direct bolt-in. If this becomes too much of a difficult exercise, I also have a Ford T170 I can use. As before, the main question is different bellhousing or not? I know a T5 swap would be much easier, but I have been that route, and 4 speeds w/ OD is plenty adequate.