the edelbrock 1409 is a 4 barrel, however depending on which 4.3, there are 3 different tuning kits
@Clarko1988 be very specific to what you have. your exact engine year (not boat year), and the induction you currently have. if your boat is a 1988 vintage, with a 1987 motor, it will have different tuning kit required than a 1988 motor
Yep most will recommend the 1409 but last I checked they like some Edelbrock manifolds are on back order, if you’re looking for new. Only other option is a Holley 4160, they were used on OMC and Volvos after Rochester quit building Quadrajets. I like the QJet but good original cores are hard to find.
Really depends on what intake you have as well. If it were me I’d get a 4bbl even if you have to find a pre-Vortec cast iron 12 bolt intake. Look on eBay they are out there…