Hey yall I just picked up a 73 w200 that was originally a 360 truck but somebody swapped a 340 in at some point. Now I don't know at all what the 340 is out of as im new to these older style trucks so can anybody tell me how alike they are? I'm going to need lots of little things like water temp, oil pressure, and other sensors like those so any insight would be appreciated. Also any solid places for old mopar parts

 

Not sure what specific parts you're looking for but.........The transmission and engine mounts are interchangeable. 340/360 are similar but different in many ways to the 318. Intake and exhaust should mount up. Small attachments like sending units are interchangeable.