The G173 means July 17, 1953 (A=Jan., G=July). I have CON4. Someone said that this designated the conveyor or assembly line. I also have the 3701481 casting number forward of the fuel pump. I'll bet yours has hydraulic lifters, too. Mysteries solved!


1948 3/4-Ton 5-Window Flatbed Chevrolet

34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.