2-mercury racing 500 class 1 engines , 496 ci, chevy bow tie block, 4 1/4 stroke hank the cranks, Carrillo rods , j&e 10 to 1 pistons , 990 heads with severe duty valves , hyd roller cam and lifters , crane roller rockers , team g intake, holley dominator, msd ing, flywheel , alum oil pan, completely rebuilt , some dress, engine is set up for a bravo boat asking $12k each