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Old 01-18-2005, 05:29 AM
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The line to the tranny should be full manifold vacuum. You could simply cut the hose by the carb, add a T fitting, and try running your vacuum advance on manifold vacuum. You will need to readjust your carb. If you have a real hairy cam you may create some rough idle characteristics if the erratic manifold vacuum signal from a large valve overlap causes the vacuum advance diaphragm to constantly fluctuate the timing.

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