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Old March 12th, 2018, 09:47 AM
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melsg5 melsg5 is offline
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to start with you have to adjust dwell before doing the timing.
could be just terminology but the timing is 12 BTDC which means it is advanced not retartded.
concerning the cylinder and a head gasket, they have coolant hydrocarbon test kits which will help in determining if the head gasket is blown.
cylinder number 8 is also too low and number 2 is low. The rule is no more than 10% variation between high and low so high being 130 nothing less than 117 is acceptable. I think both heads have to come off. Did you try a wet test to see if the rings are weak?
1971 GTO 455 HO Ram Air
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