1992 obs ac issues
 

I got a 1992 f150 and the truck don't have ac and I'd like to put it back in. According to the vin number it should have a 300 straight six. Well when I got the truck it had a 5.0 302. The only thing I can tell that I'm missing it the ax line that goes from the back of the radiator on the driver side to the compressor to I believe the dryer on the passenger side. Will this line interchange or will I just not have ac in my truck?