I am not a tech and I'm more of a duct tape and vice-grip guy than torque wrench and loc-tite. I have bought a lot of crappy old Hondas over the years that the AC had failed in. I got most of them working well again.
I would not recommend following my advice.
-See if the compressor is compressin' (jump the ground for the clutch if you have to.)
-Replace the schrader valves, and every one of the green o-rings that you can easily get to.
-Vacuum the system to get all the moisture, old/contaminated gasses out.
-Recharge with the correct amount of r134/ butane/favorite flavor of r12....
*Wear gloves & safety goggles, make sure nobody is filming, and don't breathe.
* Buy one of these:
Note to EPA: All work that I have done is under the supervision and training of a qualified HVAC A&P mechanic using approved devices.