I am thinking about switching from a carb to a throttle body injection. Has anyone done this? I have a 5L Mercrusier and would like to squeeze a little more efficiency out of her without making major modifications. Is this feasible; if so, how much work would it be? I know I'd have to switch to an electric fuel pump, and would have to get the throttle body, but would the intake have to be changed? I believe the 5L Mercruiser is a Chevy 5L (305CID); is this correct? I am pretty skilled at working on auto engines and switching intakes and fuel pumps is no big deal. I've rebuilt numerous small and big block auto engines over the years and have even done some performance work on Pontiac Firebird with a 350.