The truck is a factory AC truck. The system has not been used in years. The compressor is seized. When I did the engine swap 18 months ago, I didn't think to do anything to the lines to keep crap out.

Truck is up and running, and I'm looking at doing a full system replacement from Vintage Air.

What are some other products to look at?

Should I consider geting a new evap, condensor, and compressor and reinstalling in the truck? I was thinking that is risky not knowing the wiring for the AC, or the current condition of the parts in the truck.

Any input or advise is welcome.

 

If I were doing it, I would replace everything. Original condensor probably has crap in it, too small for decent HFC-134a performance anyway. New evaporator, it's easy to get to being underhood. New accumulator/drier or receiver/drier, new hoses, etc. May be able to re-use some steel lines, if it's really worth it, by flushing, but all-new has advantages.

Don't know what expansion method your '75 had, if it's old enough to have STV (Suction Throttling Valve), where the compressor ran continuously when A/C was ON, and effectively the orifice size changed with temperature to adjust the cooling rate.

Ford changed to FFOT (Ford Fixed Orifice Tube) system where the compressor is cycled on and off by the cycling temperature switch in the side of the accumulator. The system has a fixed orifice tube, so when the clutch is engaged, the A/C runs full bore till the cycling pressure switch turns it off. Then on again by the change in temperature(pressure). This system uses less energy, and is a pretty simple system.

Don't know if you are updating to later tech with the kit, or replacing what was there one-for-one with new parts. I'd rather go the FFOT way if it were me, and I would not leave any old parts in the refrigerant loop.
All it takes is a piece of crud or varnish to let go and enter the compressor. An in-line refrigerant filter on the suction side as a solution to keep old parts installed has no magic, if crud is letting go and circulating, the filter loads up and the system quits cooling, then it has to be recovered, opened, filter changed, evacuated again, charged again etc. More $$$ besides the hassle factor.

 

Many thanks for the informative reply. I'm leaning on a full blown new system, heat and AC. Vintage's are within range, but was wondering what other companies there may be.

The biggest attraction to Vintage or someone like them, the whole kit includes everything. New lines, fittings, includes it all.

Going to see what else there is out there, but vintage sounds like a good route to follow.

Thanks again.

 

Another place you could check is ackits.com, which is Arizona Mobile Air. They have complete kits for retrofitting, maybe something there.

They also sell AC replacement parts, which is what I have used them for, multiple times.

I wonder if your truck came with the old compressor that was used for (too many) years on Fords, Mercury and Lincoln. The 2-cylinder Tecumseh or York boat anchor that has a separate oil sump. Some people liked those, but they seemed to die young (the compressor, not the people ). Those 2-cylinder reciprocating compressors were vibration generators, vibes traveled all over with those two big single-acting cylinders. I think they took something that was designed for stationary use, and slapped it into cars and trucks. And it looked like it.
IIRC, the way to tell Tecumseh vs. York was a slight difference in the octagon cylinder head. I had two of them at one time, one of each.

Meanwhile, over at General Motors, the Frigidare cylindrical rotary A6 6-cylinder compressor was a class act, a much much better compressor, quieter, no vibes, lasts forever, was in use by the early '60s. I guess Ford couldn't hook up with any rotary compressor manufacturer in that era. But then, Frigidare was owned by GM back then.

I wouldn't think anyone would make a kit these days that would use a T or Y 2-cylinder compressor in it, but if they did, I wouldn't touch it!

But if somebody wanted to build their own small stationary air compressor, a T or Y 2-cylinder would be a good choice!