I understand the question was regarding the tranny fitting the block. But before that block can be used in a standard carrier, would you have to consider the oil sump depth? IIRC this was discussed in previous threads?
See also:
http://www.vanpeltsales.com/FH_web/f...s-adapters.htm
When Ford changed the design of the V8 engine in 1948 to the new 8BA/8RT type motor, they provided a separate bolt-on transmission bell housing adapter. This part (basic #6392) is known in the parts manuals as a "Housing Assembly). Along with this part is a stamped sheet metal part (basic #6366) which they referred to as a "Cover Assembly".
To those of us in the restoration hobby, the Housing Assembly is often called a bell housing or a transmission adapter. The Cover Assembly is generally called a starter plate, since this is the part that the starter bolts to.
The confusion exists about these adapters because Ford produced about 6 different starter plates and 6 different bell housings. The important thing to know is that each bell housing adapter is designed to be used with a particular starter plate.
8RT = Bell Housing 8RT-6392 (cast iron) = Starter plate 8RT-6366-A (3.25" radius crank opening)