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Old 11-15-2010, 01:53 PM
454C10 454C10 is offline
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You need an adjustable vacuum advance canister. summit sells them for the hei.

I would set the total mechanical timing to 38 degrees which in your case would be 25 at idle. Then set the adjustable vacuum advance to add another 10. (48 total).

I would use a piston stop to check tdc. You can make a stop with an old spark plug and a short extension welded to the end of the plug (instead of the electrode).

pull all the plugs and rotate the engine slowly until the #1 piston hits the stop. mark the balancer at the pointer and reverse the engine rotation until the piston hits the stop again. The center point between the 2 stopping positions is TDC.

Last edited by 454C10; 11-15-2010 at 02:04 PM.
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