I am tempted to use The heat exchangers on the '75 because they are in much better condition than my '74's. I have two complete engines for both a '74 and '75 bus I can use for parts. I have a '74 westy that I am swapping a new 1.8 engine into. Posted: Mon 10:27 am Post subject: '74 vs '75 heat exchangers Quick sort: Show newest posts on top | Show oldest posts on top