440 from an rv?

I am going to look at a 440 with presumably a 727 in a 71 Winnebago tommorow. Is there anything different about the rv motors that would make the swap into my demon more difficult? The guy is going to sell it with all accessories and wiring. I just want to know if there is any major difference in the rv motor and trans than would be with a swap from a car motor and trans. Thanks for the help.