First: if it is just a blower switch problem, just thought I let you know that a bad blower switch is a common problem.
Second: that old of a car could have a bad blower motor also. The blower resistor block is behind the battery and the plastic encapsulation panel that you DO HAVE (to keep water off of all of the relays)!! The plug is at the bottom of the resistor block, do not confuse it with the evaporator sensor connection that is clipped on to the block.
Third: If you do not have a blower problem, there are numerous componets that could cause the compressor to cut out...