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Re: Holley model number 4150 Street Avenger 570 cfm  p/n 0-80570  


Goodwrench SBC 350 crate engine


Gathering parts for rebuild due to ragged idle on start up and low speed surging up to 30 mph.   High speed cruise and WOT car is still a rocket.  Car dyno tuned in 2010.  Ran fine for 10 years until about a month ago.


I am researching the replacement part number for the primary metering block should I need one .


The Holley website does not give a p/n for a metering block for the 570cfm carburetor.  I found a Holley part number cross reference pdf that lists the metering block for the 570 cfm carburetor as n/s (non serviced).


So if the metering block needs replacing is there another Holley p/n that will work?

Edited by Miles
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