Some basic questions. I have access to some guages and large container of freon r-12. I'm guessing that you put the freon in on the low pressure side-if this is correct where is the low pressure side fitting and what is the max pressure you should see on the guages when the system is full? Does anyone have a picture of the low vs. high presure fittings? This is for 67 dart with original factory air. Thanks for any and all help.