i posted a couple weeks ago about my troubles, but failed to respond to your responses and im sorry. I purchased a boat with a Chrysler motor on it, and basically don't know much about it. <br />Model number:856X5L<br />Serial number:2196<br /> I would like to know what year this motor is and any tips or suggestions about rebuilding or changing the headgasket. Thank you soo much, and i will definitly be purchasing any parts and manuals i need in the future from you.