C9AF 9510 U , List 4609 , date code 903  . Primary metering block 5673 /  Secondary metering block 5671 . ALL numbers shown in pictures .  This carburetor is incomplete and listed as Not Working / for Parts Only . Been in dry storage for decades . Notice that there are two holes drilled on the back  top of the air horn , why , who knows , this guy was racing . To the best of my knowledge this carburetor was found on a 1969 Mustang , but please do your own research to determine if this part will work for you .You will receive the exact item pictured . Need another picture , contact me . Last pic works the best .