[clay68c10]

Originally Posted by SCHRUMGMC

My trucks got the original AC setup, what all do I have to replace to get it to work with modern day things. I know you can buy that one piece but what else?

Replacing the radiator and ac components too

You can get a POA valve calibrated for R134 if you're keeping the stock style compressor.
https://www.originalair.com/valves

I did it on my old 68 Cadillac and it worked great. You can also try to adjust it yourself, there are YT vids out there that show the procedure. It's worth it to get a parallel flow condenser. I did that on my 93. That will really help it cool, they are more efficient and 134 needs that.

If you take out the POA and do the eliminator kit, keep the valve and you can sell it as a core to original air for $$.

I got the Advance/Carquest replacement radiator for mine. It's plastic tank like everything is now. It fits into the 4 core supports fine.