i used ARP head bolts, torqued to spec... no we didn't have the heads plained, we are thinking that the head gaskets blew because we had a cooling problem prior, and a spark problem. I also believe that it leaned out on the top end in third gear when i was making my pass, and combined with the 240 deg. temp's the motor saw, the head gasket blew. I have since added a larger fuel pump, and next is a bigger set of injectors
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