Distributor question

Corvette kid

Member
Joined
Sep 19, 2022
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5
Building my distributor and unfortunately it has been apart awhile. I have two different cam, one is stamped 524 and one is a 730? I know what the 24 and 30, those are the degrees in which the mechanical advance is but what does the 5 or the 7 mean? Any ideas?
 
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