Title says it all. I am replacing the heater core on my 73 that has an a/c system from a 78. The blower runs slow and some of the positions don't work. I bought a blower motor and also want to replace the resistor and switch. I keep getting a Dorman number but it comes up because it fits 82 and later Camaros and 78 and later G-bodies but not 78 Camaros. I tried a 76 Camaro figuring that it would eliminate the 78 G-body factor and there are no results. Any ideas?