I just installed a new dryer and orfice and my evaporator drips so much condensation it just rolls into the cab floor. Is there a drain somewhere I need to check? It is on a 1984 Chevy.

Yes and obviously its plugged or broken. Condensation will build when the humidity is high. Look on the inside from the passenger side where the water is coming from. On the engine side there should be a drain at about the same level as the bottom of the HVAC box.

I wasn't ever able to find a drain hose. I did however drill a hole at the bottom of the evaporator plastic case and removed the water to the outside. No more leaks in the cab. Thanks for the suggestions.:)