Is it primary/secondary ? Primary plates usually have one tapered edge. Secondaries don't. I do 4100's and that's how to figure out which one goes where when they are all the same size. Have not had a Holley apart in years. Mike
Figured I'd update. Holley has no record of this carb number, but it measures out to a 750. It was originally a 4 corner, but someone hacked up the secondary metering block and made it a 2. Thanks everyone for the help.
There are hundreds of Holley numbers (older than this one) in my database, that are not listed in any of the Holley indexes. Most marine carbs are not listed. There are others. GUESSING this is an aftermarket carburetor that would have been listed for maybe one or two years in the Holley aftermarket catalog, and then superseded by a different number. As for me, no carburetors were made after 1974 so I have none of the Holley catalogues newer than 1974. If some one had a complete set, one would probably find the number. Jon
The Jalopy Journal
