Anyone know my carb jet size?

its been soooo long since I tore one apart, I used to play with those on my warmed up slant..... it was off a '74 318 motor, compare orifice to holley jet for size reference?? so that at least you know where you are and which way is which?

they are very small and stamped on the top edge, might have been more then 2 digits I think as well...in fact, I think the jets are the same for all...so no changing there HOWEVER the rods are diff for some app's....so typically if you have a lean/rich cruise...you would stick smaller rod in there and or one with a diff step to it as well, since if I remember right the rods have a step so as they pull up during power mode...they will give a richer mix sooner or later...i really dont think there r diff springs to change the rate there bu im no carter 2brl guru.