monty120 >>> exacly how many head gaskets have you changed (and on metros)? in all actuallity, my favorite brand of head gasket for stock/oem swaps is felpro. the felpro gasket is about .010" thicker than the stock on a metro. installing more than one head gasket is a practice done on older engines that have had modified compression. and then only copper head gaskets are used. too much clearance at the block and head will throw off cam to crank timing, decrease compression and hence power and effieciency, and also increase the chance of detonation by extending the distance the flame front has to travel to reach the piston. an advancement in ignition timing will also be needed to compensate for the extra distance to the piston. three gaskets are three times more likely to aquire leaks. einstien said it himself..... the fewer the parts the better the machine