65 A body transmission?

You can fit a regular 727 small block tranny in an early A, but you must hammer a lip in the tranny tunnel over to clear. I don't know about a long 727 (35" L as I recall in my C-body BB), I would worry that the mount won't be in the right place.

727 SB cable-shift trannies show up occasionally. I bought one for $100 at a swap meet. Before that, I considered another on craigslist for $100. Since, I read that a 904 is better since more efficient and can be built to survive any SB engine, and no need to massage the car to fit. Still, nice to have as a backup (in my shed). Doesn't help you since shipping is $$$.