slant 6 auto(904) to 4 speed help

Hmmm, well thank you for getting back to me. I'll see what I can come up with.

Not bad per se but your options are limited:
1. use a OD BH with an alignment ring.
2. Find a 64-66 4-speed bell - ( rare )

3. swap the trans with a OD and use a "late" model OD alum BH