If you go for the later model stovebolt engine option, it might be a good idea to search for a 261. They're out there, and on occasion you can find one that the owner doesn't think is gold plated. I've been given two of them- - - -"Just haul it off- - - -it's taking up too much space!" If you choose to modify the doghouse to clear a V8 engine, the stamped sheet metal tub of a wheelbarrow makes a good starting point.
Jerry