What is the PD number on the carbs to help identify them. You have a CB550K 1978 and they are PD46 series. Are they those style?

They are the early style not PD46 later ones. They are not in great shape maybe best for parts. There is a number on the bodies usually around the float bowl and carb body join area. Sometimes on the upper tower section too. 
My interest would be for the PD46 series for parts. Those use a different internal jetting setup

Okay, thanks. Still can't find any pd #s. In the scrap pile now.

Missed this until today. Pretty sure those are for a cb650.