Dart Big M 8.1L Full Metric Block
10.236 deck height, 4.250 Bores, no fuel pump, 1/2 main bolts, front cover & oil pan are Gen VII, 8.1L head bolt pattern with reluctor hole. Dart casted these blocks specifically for Mercury Marine 496 engines. Call or message us about our other blocks. We carry the full line of Dart Big M's, Little M's and Ford Iron Eagles. We also have a large quantity of good used Cranks, rods & pistons for Big Block Chevy.