[b-man]

Have the minimum amount machined off the deck to make it square with the world.

Measure it (your machine shop can handle this) and buy your pistons with the correct compression height to put the pistons within .005” of the deck.

This way you won’t end up doing a bunch of extra machining and you get a custom piston made to the most ideal specifications.

If you have already purchased your pistons then you’ll just have to cut the block the amount needed to achieve whatever deck height you’ve decided on and roll with it. Custom pistons do cost a bit more initially but make the build go smoother all in all.