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Stay away from blocks that are rusted from sitting in the weather for years. The machine work to correct all the issues caused by the rust is far more than just getting a good block to start with.

They should work fine. X heads have zero quench area, and the factory 10.5:1 compression pistons are above the deck about the same amount with the factory shim gaskets (around 0.015)which are much thinner than the common felpro replacement gaskets (around 0.038 to 0.042).

Hydralics have a more aggressive ramp that solids but suffer from lifter pump up at high RPM. They reason they have more aggressive ramps is that they do not have to have the gentle initial ramp designed to take up the clearance (valve lash) that is in a solid setup. You can get 425hp out of...