Those of you with AC...

I am using the factory AC box and a condenser kit from bouchillion performance with stock 5.7 truck compressor.
http://bouchillonperformance.com/inc/sdetail/470/545
I had an issue with the first expansion valve. It quit cooling and was basically stuck shut I thought maybe I had some debris or something so I ordered a new one and replaced it, but determined it was simply faulty as everything was clean. It cools ok, but I still don't think the expansion valve allows enough flow as my high side pressures run high and low side run low.