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Message: <blockquote data-quote="24hrlemons" data-source="post: 811062" data-attributes="member: 11363">Our endurance racing 3.8 '98 mustang T5 blew up last weekend. Got hot, blew a heater hose apart. I fixed it, did not see obvious signs of malfunction, oil and water were OK. Went back out. Less than 2 hours later a driver reported it went "bang" and stopped. We found a blow freeze plug on the R head, and the spark plug was blown out taking threads with it of the center cyl on L. After disassembly, we found the combustion chambers were badly erroded, most likely from racing with a failing fuel pump creating a lean burn condition. We surmise that the head become erroded badly enough that cooling water was able to leak through the pouros casting exposed on the combustion chamber and nearly hydraoulic locked the cylinder with the blown spark plug. The combustion was also able to pressurize the cooling system with steam and blew out the freeze plug.We're looking to get the car back on the track, but would like more power. Looking at parts or engine replacement. I understand that the truck 4.2 is the same block just bored and stroked. Is this correct? Can we just bolt that in? Would that be a good engine to put in the race car, perhaps with the windstar intake that I read about? We were also going to try to get a mid level performance cam and do some mild porting on new heads, get some new bearings, seals, water pump, etc while its apart.Due to restrictive rules, I cannot do things like adding supercharger that would make sense otherwise.TIA!</blockquote>