hmm.... this carb is: 7045183 K4 1475
70 = Rochester products division#
45 = Production year, 4=1970's, 5=specific year, 1975
1= Carb ID --> 1 = 49 state 2bbl?!?!
8= A non GM product division. possibly Mercruiser marine engine??!?!
3= An odd number = a manual transmission
k4= Engine assembly plant?
1475= manufacturing date..... 147th day of 5 =1975
I dunno what the hell I'm going to do with this thing. Waste of 10 bucks??