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My 69 Shelby GT350 came with a carb that was obviously way too big for the engine. I replaced it with a more suitable Holly 600 cfm, but I'm trying to find out what this monster is and what engine(s) it's used on. I know some of you out there have this stuff committed to memory. It's a Holly carb with manual choke and the list number is 3259-1. Below the list number on the air horn also appears the number 0305. Thanks folks for the help.
 

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According to Holley, it's a 4150 series carb that is 725 CFM.
 

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Additionally, the four digit date code says it is not a Ford original installed part. Ford used three digit date codes exclusively in the sixties/early sevevties.
 

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3259-1 is the Shelby 65/66 GT350 715cfm carb It has the original LeMans float bowls. It is a far superior carb than that 600cfm you replaced it with.
 
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