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Old 04-26-2004, 09:41 PM
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timing spec for 73 olds 455 stock engine

Can anybody tell me the timing spec for this engine? It is all stock, except for a Holley on it instead of the quadraflog. the person that set it up had the vacuum lines going everywhere but where they should be, and I know the timing is off because of that. I rerouted the vacuum lines, so now all I need is a base timing spec. It has an HEI distributor, with mechanical and vacuum advances both working.

Thanks,

Rick

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Old 04-26-2004, 11:01 PM
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Rick, Motor's says there are 2 settings, one for intermediate and one for full size cars. They are:

Full: 8* BTDC @ 1100 RPM

Intermediate: 10* BTDC @ 1100 RPM

Both with the dist vac line disconnected and plugged so as not to lean it and raise RPM's.
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Old 04-27-2004, 04:46 PM
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Cool! Thank you very much! It is going to be in a midsize (G-body), so that is very helpful.
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