I spoke with Tom Langdon, who sells an HEI converted for the I-6s and he said the curve they come with is pretty agressive and the vaccum cannister uses a soft enough spring so that it'll advance a lot with the I-6 216/235/261 since it was made for an engine that produces less vacuum.
'51 Chevy 1/2 ton w/'62 261, HEI, offy, fentons, dual carter/webbers, t-5 & 12 bolt posi
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