I have the chance to purchase a Merc 165 boat engine which is built on the GM 230 CID engine. My question for this group is what differences are there internally between a 230 pick up truck engine and the 165 Merc.? I also have a "not so good" 250 CID and would like to put all the best pieces from both engines and end up with a decent driver 250. Those that may be able to help me with this subject, please do.
Al
Alan