Carter WCFB carburator part number 3961419, tag also has GR5-529 and E4 stamped on it. This carb was for the 265 hp 283 dual carb set up. It has the idle system and heat controlled choke. It is old and needs new gaskets, otherwise it is in very good condition - shafts are nice and snug and everything works, with a bath it will look like new, wish I could put a picture in here. It has been stored in a box on various shelves for the last 45 years!