Help needed with sb 318

Me again. Due to the age of the ol monster, and in need of some parts....short term....truck tire rims.....long term, maybe a backup engine and transmission.....so have been looking around for a parts donor......and came across a derelict 1975 Dodge D600 truck. Problem being, it appears to have a 361 engine, vs. my 318.

Would that be an easy swap that would bolt up with no mods? Or better to leave that one alone?

Sorry to keep coming here for advice, but you guys know more about these engines than the rest of the Internet combined.