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Old 05-31-2008, 05:22 AM
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The only problem with stock bores is that GM does not plate hone their blocks and a stock engine don't build the cylinder pressure that a performance engine will build and maybe and issue later on.

If you take a block with with round cylinders and set a torque plate on it and measure the bores you will see up to .004 distortion from low to high between the cylinders.

If you are going to bore the block have the decks squared to to insure a true 90 degrees to the crank and a tue 45 degrees from the crank and cam center lines.

Good luck with your build Carl
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