What do you change to deck the block?

68fastback said

I am going to square deck the block to 0 deck to raise my compression, but do I need to change push rods or mil the intake at all?

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Usually i don't have a problem on the front and rear of the block intake seals as I use silcone and no gaskets anyway. As far as the pushrods that is something you'll have to check when putting the engine back together.