For about $100 or less a new stock cam and lifters can be had. I would at least do that and have a fresh cam with no wear and new lifters. Not a whole lot more gets a comp cams 240 or 252. If I were going to run either engine that is the least I would do. The stock 250 cam (either one) is bigger than the stock 230 cam. Some people have had good luck with the Mercruser cam but I don't know how much they cost. Just a thought. Jay 6155
