Magnum vs LA block...differences...preferences

The only draw back is (IMO) oiling the LA head in a conventional manner. A member here drilled at the rear of the heads and down the ear rockershaft stand to create an alternative. He “T’d” at the oil sender location and ran oil lines to the heads. The attaching bolt was also drilled to allow the oil up and to fill the rocker shaft.

To a lesser degree, the deck height is shorter so when you use LA pistons, depending on the deal, they can be at a positive deck height. A thicker head gasket takes care of that. But you can almost always be stuck with a higher comp ratio that your trying to target.