Bake sorry to say it doesn't work anymore. Needs a 134 retrofit. Was told it worked good before with 12 tho. I work with the previous owner so I would believe him. Getting cold outside now so guess I will worry about the A/C next spring if I still have the truck. Have an oil burning thing going on in cylinder #1 as the new plugs are normal except 1 as it was oily. Think it may be the value seal but the truck is kinda blocked in my driveway for the next week or so as I have a painter at the house and he put up a scaffolding for the job. Glad I had another truck in front. Gonna take the 87 to the tools at the girlfriends garage when the painter is done and fix the oil burn thing. Than just fix things as they break because I only got this truck to drive to work and as a beater around town. I have more trucks and bikes to spend my money on.