I've been looking on and off for a 2 barrel carburetor for my truck, I already have the intake. I found a Holley 6221-2 for sale, but don't know if it will work for my application. I tried google, Holley (web, not phone), and some other avenues to determine the cfm. The seller says that he bought it from ebay and it was listed as a 350cfm (which I believe from searching here is what I need.) I found a site http://www.holley.com/data/Catalogs/Reman/242.pdf that lists the OE number and a sales (remanufactured?) number. The sales # is 64-1169. I tried searching that too, but nothing I found listed anything other that vehicle application. Just wondered if anybody had any input on either if it would work, or where to look. I did find some message board items, but they were split on whether it was 350 or 500.