A/C stopped working

[ddiblasio]

I live in Powhattan County VA., SW of Richmond about 40 minutes.
Since I had to remove the plenum, I wanted to take care of as much as possible. I replaced my coil paks with new ones as No 8 wasn't getting any spark. While at it I fixed or resealed any place where a vacuum leak might be or occur. Tightened bolts etc. new serpentine belt, plugs all new gaskets and O rings on injectors etc.

Replaced my dual fuel pump system to a single pump system as per Mark H.
Runs great.

Now AC has stopped working. It was always a bit weak, but AC compressor clutch does not engage. Took it to a local shop had it vacuumed new
regrigerant.
No luck.
I was told low side port is very high on pressure. I have tried several so-called Car A/C experts, and none seem to exist in my area. Called Evolution Auto sports in Fredricks burg VA. They said they don't work on A/C systems. ???? any thoughts??
Thank you all and thanks to Marc Heibeck for all his help on the phone.