got a 2150 motorcraft carb. its got a 1.2 stamped into the right side of the carb body. the carb came from a 351w, its a 75 model carb from a granada or such. what does the 1.2 stand for? also, this carb has an 11 stamped into the bottom of the body, what does this mean? i've heard these relate somehow to the cfm of the carb or how much fuel it delivers. any help appreciated!