I purchased a "new/old" carb (WGD 4874S-4875S Carter 2bbl) off eBay. It came without the fuel inlet fitting. (original part # 15-68S) These carbs were used on 63-67 326 motors & 65-67 389/400 motors. Can anyone point me to a site, a person, or a store where I might find this fitting. I have exhausted all the part stores in my area. description of the inlet on the carb: 9/16" ID, straight thread, (not tapered) 18-20 threads per inch.