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  1. 1964-1974 Tempest, Lemans & GTO General Discussion
    GTO Gurus, my 400ci engine started making some "exhaust leak" noises on the passenger side of the engine....seems to be coming from around the back near # 6 and 8 cylinders. I checked compression (with all spark plugs out) and the readings range between 155 -165psi. Don't think it's a cylinder...
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