Boat motor?

I have a 440 out of a boat and there were a few specific parts that were for a reverse rotation only. The dist had a weird hold down and the camshaft is opposite along with the gear for the dist. If you do have a reverse get the crank polished so the rear seal does not leak, no idea why. all the bottom end pans were for a boat, like a cast aluminum oil pan. I would google 340 Chrysler marine and you should get some good info.