Remanufactured GM Marine 7.4L / 454 long block engine for 1996-2003 applications. Standard Rotation, Gen V, Gen VI, 4-Bolt Main.

Remanufactured GM Marine 7.4L / 454 long block engine for 1996-2003 applications. Standard Rotation, Fuel Injected, Gen V, Gen VI,

Remanufactured GM Marine 7.4L / 454 long block engine for 1973-1990 applications. Reverse Rotation, 2-Piece Rear Seal, Flat Tappet, Mark

Remanufactured GM Marine 7.4L / 454 long block engine for 1973-1990 applications. Standard Rotation, 2-Piece Rear Seal, Flat Tappet, Mark