Greetings . . .
Leif I think it is that simple. Swap the cam and replace the distributor gear so that the thrust is right, otherwise the engine is trying to push the dizzy off the cam. Not sure about the oil pump - that maybe as simple as turning the impeller over on the shaft - but then again I've never been inside a mopar pump. Swapping a stock automotive pump would do the trick otherwise. I really don't think that the lower end is any different. It's wasn't on a set of v-thingies I saw getting prepped to go into a boat.
Oh and you will need a starter that turns in the right direction - but a rebuild shop should be able to fix that.
Now the salt is another issue.
regards,
stock49