Newbie shadetree mechanic.<br />Bought a winter project.<br />1999 20ft Stingray, 5.0 Mercruiser EFI<br />Has (2) long cracks in the block, (1) per side just above the oil pan.<br /><br />Boat looks like the plug was left in and rainwater filled the boat to just above the location the cracks and froze. (May be irrelevant.)<br /><br />Question:<br />Can I replace the 5.0 Mercruiser block with a 350 engine block? Using truck specs (steel crank, rods, 9.5 pistons, etc.) and marine gaskets.<br /><br />Be blunt. Is it "do-able"? Or am I trying to make chicken salad from chicken manure?<br /><br />All comments and technical tips are welcomed.