1962 dodge lancer v8 swap. info needed

the 727 is larger and will hit the lip where the floor board and firewall meet. the 904 is smaller and clears easier. the 200-4R is very small and has the advantage of being an overdrive trans. for it you need the adapter plate, a GM to Torqueflyte torque convertor, and you will need to have a custom drive line made. you will also have to fabricate the rear trans crossmember and mount.
the 318 plan makes the convertor balance issue go away but you will still have the early/late pilot hole issue to watch for depending what year engine/trans combo you end up with.
I had to deal with this when I used a '78 318 with the cable shift trans. not to confuse the issue too much, but you can also use the older trans with a newer front pump which will allow you to use the newer convertor so everything matches.