R134a Swap
IF THE IMAGE IS TOO SMALL, click it.
The A/C system had already been converted to R134a before I bought it, but it was empty. When I charged it, it leaked out in a few weeks. So I collected some used factory R134a parts (hood latch bracket, grill air deflectors, parallel-flow condenser, hard Aluminum liquid line, blower/evaporator box) and bought the best new parts available (Ford/MC
YCC193/5U2Z19V703A compressor,
YF37187/F5TZ19D850D manifold hose assembly (UAC copy
HA10291C),
YG346/F5UZ19D990AB red orifice tube, CarQuest
T33091 accumulator/drier) and some refrigerant (2.5 cans/38oz of InterDynamics HFC134a, a few ounces of PAG46, and some UV dye) to upgrade it to the '94-97 system.
In the first pic (top left), the fresh-air tubes have been removed from the throttle body & air filter box, the belt & compressor are off the engine, and the condenser has been lifted out from in front of the radiator (which is still connected by its hoses & lines, simply tilted back) without losing ANY fluids. The second (top center) shows the entire refrigerant system (including blower/evaporator housing) has been removed from the truck; the third (bottom left) shows the refrigerant system intact (with whatever pressure it had still in it). The far right shows all the used & new R134a parts installed, including new evaporator cover insulation (foil-faced bubble-wrap).
.
.
Immediately after installing & charging the system, I made a ~1400-mile round trip from Memphis to Gainesville for a week, and it worked perfectly, even on the lowest fan speed (where it was still uncomfortably cold sometimes).
Throttle linkage cover (not shown) E9TA9E766AA
Low-pressure (clutch cycling) switch
MC YH552/Ford F3AZ19E561ALiquid line Ford F6TZ19837AA
cheap copy 
![ac134a.jpg R134a Swap
IF THE IMAGE IS TOO SMALL, click it.
The A/C system had already been converted to R134a before I bought it, but it was empty. When I charged it, it leaked out in a few weeks. So I collected some used factory R134a parts (hood latch bracket, grill air deflectors, parallel-flow condenser, hard Aluminum liquid line, blower/evaporator box) and bought the best new parts available (Ford/MC [url=https://www.amazon.com/dp/B00JIVP4X0]YCC193/5U2Z19V703A compressor[/url], [url=https://www.amazon.com/dp/B009B5SAKW]YF37187/F5TZ19D850D manifold hose assembly[/url] (UAC copy [url=https://www.amazon.com/dp/B00CFQPZ98]HA10291C[/url]), [url=https://www.amazon.com/dp/B000C5C4QG]YG346/F5UZ19D990AB red orifice tube[/url], CarQuest [url=https://www.amazon.com/dp/B000CZ341A]T33091 accumulator/drier[/url]) and some refrigerant (2.5 cans/38oz of InterDynamics HFC134a, a few ounces of PAG46, and some UV dye) to upgrade it to the '94-97 system.
[url=https://www.supermotors.net/vehicles/registry/media/769828][img]https://www.supermotors.net/getfile/769828/thumbnail/labelr12.jpg[/img][/url]
In the first pic (top left), the fresh-air tubes have been removed from the throttle body & air filter box, the belt & compressor are off the engine, and the condenser has been lifted out from in front of the radiator (which is still connected by its hoses & lines, simply tilted back) without losing ANY fluids. The second (top center) shows the entire refrigerant system (including blower/evaporator housing) has been removed from the truck; the third (bottom left) shows the refrigerant system intact (with whatever pressure it had still in it). The far right shows all the used & new R134a parts installed, including new evaporator cover insulation (foil-faced bubble-wrap).
[url=https://www.supermotors.net/registry/media/964781][img]https://www.supermotors.net/getfile/964781/thumbnail/evapins.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/1142307][img]https://www.supermotors.net/getfile/1142307/thumbnail/20181018_162302.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/980964][img]https://www.supermotors.net/getfile/980964/thumbnail/35duct.jpg[/img][/url]
Immediately after installing & charging the system, I made a ~1400-mile round trip from Memphis to Gainesville for a week, and it worked perfectly, even on the lowest fan speed (where it was still uncomfortably cold sometimes).
[url=https://www.supermotors.net/registry/media/1169074][img]https://www.supermotors.net/getfile/1169074/thumbnail/speedhaul.jpg[/img][/url]
Throttle linkage cover (not shown) E9TA9E766AA
Low-pressure (clutch cycling) switch [url=https://www.amazon.com/dp/B000C5HZMO]MC YH552/Ford F3AZ19E561A[/url]
Liquid line Ford F6TZ19837AA [url=https://www.amazon.com/dp/B09R3W65SP]cheap copy[/url]](https://www.supermotors.net/getfile/1168980/fullsize/ac134a.jpg)