Do the newer ATV engines all have the same mounts and mounting positions?

Wondering how feasible it would be to swap engines/transmissions across recent-era Honda ATVs… like swapping in a Honda Rubicon/Hondamatic into a Rancher 420 AT chassis, or a Rincon. Anyone know how readily these will interchange? If there aren’t major differences in mount positions and clearances, it might be an interesting project. If there are… fuggetaboudit.