Can anyone guide me in the right direction on an inexpensive way to convert my 350 mercruiser engine to thru hull exhaust . I am in progress of a restoration on this boat and figured it would be much easier to do with the boat all tore down . The boat is a 1982 Silverline Larson farallon 19 1/2 ft cuddy cabin with a mercruiser 350 , 260 hp engine . I have seen all the silent choice stuff out there to buy , just wondering if there was a less inexpensive way to do this??