Holley metering block #
Thread Starter
Instructor
Joined: Aug 2007
Posts: 131
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From: Madison NJ
Holley metering block #
Can someone tell me what the metering block #'s mean on a Holley.
I have a 780 list # 3310,with #5271 primary and #4519 secondary.
I think someone changed the carb. The info I find is that for a my 1970 350 LT1 the the Holley was a 780 list #4555 with primary #6333 but the same secondary #4519.
What is the difference? Do I need to change the primary metering block?
I have a 780 list # 3310,with #5271 primary and #4519 secondary.
I think someone changed the carb. The info I find is that for a my 1970 350 LT1 the the Holley was a 780 list #4555 with primary #6333 but the same secondary #4519.
What is the difference? Do I need to change the primary metering block?
