Sounds like a vacuum leak on the rpms thing. Head may not be cracked, just a head gasket failure. I don't think the two are related
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Sounds like a vacuum leak on the rpms thing. Head may not be cracked, just a head gasket failure. I don't think the two are related
It has been a good motor. Getting close to 300K on it now and going to need a refresh. You can make them go to 300 hp with some work. But if it is just a trail rig, put the 383 in