502 timing
#2
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I'd set the total to 34° and let idle timing fall where it may.what ignition system are you using?
#3
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You may want to stay closer to 32 depending on your setup. Initial will be dependent on you distributor and if that's adjustable then cam plays into it. Demons can take higher fuel pressure I think up to 11ish + psi but I have mine regulated at 9 at the moment.
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mercruiser thunderbolt distributor and ign. thanks for the answer
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