[Stainbox12]

I recently purchased a straight edge and a set of feeler gauges, to measure the deck of the block and the head. I´ve been having problems pushing coolant with my new cometic gasket. My head was milled but the block wasn´t. I had overheating problems, but now that i installed everything the gasket and torqued down everything properly, i still have overheating problems. I guess that the block is warped. I would like to measure the block deck for straightness, and i know this is done with some feeler gauges and a straight edge, but not sure about the procedure, if anyone knows, please let me know. Thanks.