I've fallen into a 1995 Bayliner Capri with a mercruiser 3.0,,, repair shop told the owner that the block was cracked (not sure if that's true or not) Anyway my question is this,, is there a difference between an automotive block and a marine block? I'm looking for a winter project and prefer autos but this boat really does look like new and I'm tempted to dive into getting it running again.. Thanks in advance.. Your site looks great..