For some reason my cars coolant overflows under hard acceleration and causes belts to slip. It also looses coolant under normal driving. The car does not miss at all and no water is in the oil, and the car does not smoke at all. I recently replaced my 3rd set of headgaskets which appear to burn the water pockets. I thought it was an overheating issue so I replaced my water pump with a flow cooler water pump, Fluidyne radiator, Mr Gasket therm. 180 and new hoses, and wired my fan on high. Took my car to the dyno with a new set of Mr Gasket ultra headgaskets. But as soon as the car went to high rmp the water started to overflow thru the coolant rec. tank and radiator cap. We came to the conclusion that it is not a cooling issue or gasket issue. We thought the block may be worped or cracked so I tried a can of A&W block sealant but the problem is still there. The only thing I can think of is that the block may be worped I do have arp head studs on the car. I have had my heads resurfaced and pressure tested so I dont think the problem is in the heads. I am totally puzzled and tired of the problem. The machine shop says that they can deck my block but it would have to be completely disassembled. I would hate to do that without trying everything else to fix the problem fist. I am tires of taking my car apart.