Looking to upgrade my 454 mags with some super chargers. Seeing what's out there. My boat is a 1988 formula 292 so not a ton of room in front of engines and under hatch so smaller setup is the only way to go.

Mid-late 80s 454 mags can either be 2 or 4 bolt mains but more importantly they have all cast internals, unlike the newer mags which used forged parts, just a heads up before starting to crank power