I have a 68 Glass Master boat that has a later model mercruiser engine and outdrive. The problem is that I'm not sure what year it is . The outdrive ser # is 5706420 and the engine ser # is 5741440 and it is a 120. I just want to be sure before I start ordering parts. I've looked on some of the sites but the info is kind of vague. Thanks for any help.
