The number on the box and the collectors is 550016. Everything is new in the boxing has the gasket, collector flanges and hardware! Theres even a sticker and instruction sheet in there!
Those are the old style built Cliffords. Fitment is 1960-1966 225 cid "A" body. Requires use of 14 inch or larger wheels for proper ground clearance. Price in 2002 catalog was $289