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Been a while since I've posted here. I have a 1987 f250 460 with C6. The factory Holley carb needs some refreshing namely the vac secondary diaphragm. I emailed holler and they were no help at all. They sent me another website to try of a company that deals in older holleys. I emailed them pics of the numbers twice and never heard anything back, so here I am. Wonder if someone has some info they could pass along. Thanks.
Ford used to sell the secondary diaphragm separately
Some of those carb kits are over a hundred bucks these days
Shop around on Ebay for a kit once you come up with a kit number
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