I have a 1977 F150 with york style compressor, I bought the kit and changed all but the hoses just to eliminate any issues. However I ran into one..... the compressor came filled with 3oz of oil, assuming PAG or mineral. I am converting from r12 to r134. But I can't find anywhere how much oil the system requires.... I don't want to put too much or too little. When I look up the chart it says to refer to the a/c tag under the hood which is non existent, previous owner must have removed at some point.

Does anyone know or have a pic of the tag?

Any help would be greatly appreciated.

I did post this is the 73-79 forum as well.

 

This is from a 78 F250. Hope it helps.

 

Is it still a York compressor? If so I would assume the same abount and type.