Will Delco-Remy centrifugal advance springs work in a MP distributor?

halifaxhops said

I think he has a Mallory style told him to call me.
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If that’s the style of advance mechanism the OP has then the Summit part number above is for THAT advance mechanism. That Summit part number will not fit the earlier advance mechanism.

I can’t remember Mallory’s nomenclature for the different advance mech’s and I can’t find my book.