[Batmanntexas]

Assuming you buy the rotating assembly as a kit, the only machine work needed for the block is the align honing of the main bearings.

Honing the cylinders would be required for any engine build using new pistons/rings. Decking the block, while highly recommended, is not necessarily essential.

The crank, rod, and piston combo are engineered to work within the stock block configuration, without the need for major machine work.