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Alan Roehrich · 04-02-2012, 04:21 PM

Bobby, 3310-1 is the actual list number, that's a 780 Holley vacuum secondary carburetor.

Unless it has a GM or other OEM part number, it's just an aftermarket carburetor. It's legal for any Chevy engine that uses a 780 Holley vacuum secondary carburetor.

A GM number would be 7 digits, usually beginning with the number 3, followed by a dash "-" and then a two letter suffix. For example: 3xxxxxx-XX.

04-02-2012, 04:21 PM	#2
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,116 Likes: 1,573 Liked 1,832 Times in 415 Posts	Re: Holley Carb Bobby, 3310-1 is the actual list number, that's a 780 Holley vacuum secondary carburetor. Unless it has a GM or other OEM part number, it's just an aftermarket carburetor. It's legal for any Chevy engine that uses a 780 Holley vacuum secondary carburetor. A GM number would be 7 digits, usually beginning with the number 3, followed by a dash "-" and then a two letter suffix. For example: 3xxxxxx-XX. __________________ Alan Roehrich 212A G/S