I have a blown head gasket on my 1992 Chevy Astro, which has fuel injection. I also have a 1985 Chevy Astro clunker that has a good carbureted engine in it. I have two questions. Can the complete 1985 carbureted engine replace the 1992 fuel injected one? Can the heads from the 1985 carbureted engine be put on the 1992 fuel injected engine?