I have a Holley carb that has the part number 3977S and I cannot find any info on the web or here on Team Chevelle as to what size it is. It's a VS carb but I need to know the CFM. Anyone have any info on these? Thanks

Billy

It's an over-the-counter 780 cfm carb listed for use on Chevy and Chrysler "426" engines in the Holley black book.

Eric

It's an over-the-counter 780 cfm carb listed for use on Chevy and Chrysler "426" engines in the Holley black book.

Eric

Thanks Eric,

I probably will not use it anyway because I prefer mechanical Secondaries.