1981 camaro ac/heater box
 

where can i get a diagram of the inside of the ac/ heat distribution box loacated under dash, also need the two acculators for this set up, any suggestions

Diagram of the physical shape, or the cables and ducts? What are you exactly looking for inside the heater? Parts will probably have to be purchased used. We have a local junkyard that sells and ships. They've got a lot of late 2nd gens there.
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That's a wonderful Web sight.