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By layourman - 15 Years Ago
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Come on guys! somebody must have an answer to my question, On the 1957 tbird 312, the carb from the factory was the holley 4 barrel, list 1273 ecz-AD Can anybody tell me what the numbers on the metering blocks were? from the factory. I am waiting for word from Holley but they are taking their time. Thanks
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By Ted - 15 Years Ago
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On the List#1273-1 (ECZ-AD) carb I have sitting here, it has a #1584 primary metering block and a #1589 secondary metering block. My Holley parts catalogue verifies that the 1589 secondary metering block is indeed correct for this carb but the listing for both the list #1273 and list #1273-1 carbs has a blank for the primary metering block. But I’ve no reason to believe that the 1584 primary metering block is not the original for this carb. Hope that helps.
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