440 from an rv?

Where would the casting numbers be located? The casting numbers on the block shoul tell me the cubic inches and the year right? Also, could I use the trans if I found a car or truck 727 for the tailshaft and other parts to make it work? Would a small block trans have the right tailshaft and other parts? One last thing is what are the head casting model numbers, where are they, and what heads are best? Thanks again for the help.