440 / 727 from motor home

I have my 74 dart i am building for the 2013 Hot Rod power tour. i am going to take out the \6 and replace it. I have a freind that owns a large salvage yard. he has offered me a 440 / 727 out of a motor home 62,000 miles. i don't know much about bb dodge stuff. so is it the same as a car block and are they worth messing with.