This is a picture of the carb that came off 1968 my 580 ck backhoe with a G159 motor. I need the adjustable main jet for it and the I looked online and there are some but I cant find the identification number it anywhere ? It says Bendix on the top half and Zenith on the bowl ? it is not the electric solenoid style , its the early style that manual adjustable . I took it out a few years ago tom replace the junk electric solenoid one in my newer 580 ck . now I need another to replace this one. I cant find the id # to buy the adjustable main needle . The original OEM parts number for the main is A51330
