Air conditioner not working?

Yes the system was vacd for 45 minutes and pulled to 29hg v. From what I understand 55 psi on the low side is fine for 100 degree ambient

Just to add to this one if the port missing is the one right by where the high pressure switch screws on thats the charge port. Get the hose you cant add the port and make it work. Also change the engine wont effect which hose you have.

Here are the specifications.

Referigerant is 36 ozs without rear unit and 64 if with rear unit.

At 2000 rpm thats right where im sitting on the low side. High side shoots sky high and kicks out

Ac work can be very pricey. If you're gonna do this then you'll need to replace the dryer, orfice tube, evaporator, and the condensor. You don't need to replace any lines unless they're leaking. Just be sure you flush out the lines to remove any metal that may be in them. Make sure you replace all o-rings too. And use the proper ac oil. The parts store will help you on which oil will be best. Good luck

If you are sure the expansion valve, condenser and referigerant is correct, the other thing that can cause this would be the condenser is not being cooled sufficiently. Try spraying a fine shower of water onto the condenser and repeat the test. I don't think it is the compressor that is faulty because a bad compressor would not be able to push very high pressure, unless the relieve valve internally is stuck and supplying excessive pressure.

Its a new orrific tube. No expansion valve on my truck no rear air. Condensor is new

Condenser is new but is it of the correct size? Is the cooling fans working correctly and drawing sufficient air through it to cool it well?

Yup its the extreme duty condensor larger than stock. Clutch fan is removed and twin 16 inch e fans are in place

Check the fan blades to see they are moving in the right direction. Did you try my sugestion of splashing water on the condenser to test?

The fans are running correct. Havent got back to the shop to get my manifold yet