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tach drive distributor Qs

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Old 11-19-2014, 10:24 PM
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20round
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C2 of Year Finalist (stock) 2019
Default tach drive distributor Qs

hi there, i am rebuilding my distributor, and i have several that i have been taking parts from to complete mine. my Q is, what is the difference between the HP main shaft and the STD main shaft? are they marked with anything to tell them apart? thanks
Old 11-20-2014, 10:19 AM
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Donald #31176
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I believe the shape of the "football" on top of the shaft is the difference.
Delco at one time produced about a dozen different shafts but now the rpros are either base or HP versions. Doesnt matter as one could fashion an ignition curve to his liking with either repro shaft with a combination of different weights, springs and autocam .



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