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Deals and Appeals => Wanted to Buy => Topic started by: lwg8tr0514 on January 13, 2026, 07:25:20 AM

Title: 735 cfm, 5719 primary metering block, 5661 secondary metering
Post by: lwg8tr0514 on January 13, 2026, 07:25:20 AM
Need for my 68 GT 500 428PI
Title: Re: 735 cfm, 5719 primary metering block, 5661 secondary metering
Post by: azdriver on January 13, 2026, 07:49:42 AM
Everything I have seen lists the C8ZX carburetor as 760 cfm 🤷�♂️

Pat
Title: Re: 735 cfm, 5719 primary metering block, 5661 secondary metering
Post by: lwg8tr0514 on January 13, 2026, 07:54:58 AM
Quote from: azdriver on January 13, 2026, 07:49:42 AMEverything I have seen lists the C8ZX carburetor as 760 cfm 🤷�♂️

Pat

Its the right carb...C8ZX-9510-A .... list 4129... date coded 8B4... 735 Holley for 428 PI
Title: Re: 735 cfm, 5719 primary metering block, 5661 secondary metering
Post by: Drew Pojedinec on January 13, 2026, 08:24:08 AM
Quote from: azdriver on January 13, 2026, 07:49:42 AMEverything I have seen lists the C8ZX carburetor as 760 cfm 🤷�♂️
Pat

Yes but what you read is incorrect.
Title: Re: 735 cfm, 5719 primary metering block, 5661 secondary metering
Post by: azdriver on January 13, 2026, 08:48:19 AM
Seems to be the case more often than not..

Pat
Title: Re: 735 cfm, 5719 primary metering block, 5661 secondary metering
Post by: Drew Pojedinec on January 13, 2026, 07:31:16 PM
Quote from: azdriver on January 13, 2026, 08:48:19 AMSeems to be the case more often than not..

Pat

Is a funny thing.
700-735-760 etc
They are all for the most part the same carb.
Same venturi size, same boosters, same throttle bore, same throttle shafts, etc

CJ carb only vary slightly one to another.
4129 is a little more odd, and in the 1970s there is some variation.
Different methods for the same end goal
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