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By SIDSERV - 8 Years Ago I am looking for a carb adapter for my small square bore 4 barrel intake to fit one of my holley 450s.  Do any of you know a part number of one or possibly have one for sale?  I have the older thunderbird small 4 barrel intake that I want to put on my 292.  By carl - 8 Years Ago I might have the spacer you need,i will check tomorrow    Carl By Rono - 8 Years Ago You can try "Transdapt" also. I bought a couple for my Edelbrock #257. They have lots of carb adapters. Rono  By GREENBIRD56 - 8 Years Ago Speedway in Lincoln, Nebraska probably has just the right thing - check their web site. usually a fair price and near instant delivery.... By paul2748 - 8 Years Ago Jegs has them By carl - 8 Years Ago I do not have the spacer you need.     Carl By Ted - 8 Years Ago I’ve used several of the Speedway adapters for mating later model carbs to early Y dual quad intakes.  The same adapter would work on a single four intake.      http://www.speedwaymotors.com/Holley-Edelbrock-to-Carter-WCFB-4-Barrel-Carburetor-Adapter-Plate,5551.html