Anybody know...

I'm confused. Will your gasser use the slant six? If not, you need a different transmission regardless since bellhousing bolt-up varies. Small blocks came w/ both the 904 and 727, the later probably for police, taxis, and/or trucks. I doubt any slants came w/ 727 in an A-body, though understand there is a truck version w/ adapter for slant, or maybe thinking of a 4-spd manual.