Mark, thanks for the thumbs up! I'd like to use this thread to document the entire A/C system as best I can and cover all the components, ducting, controls, baffles/filler panels, wiring, etc. Hopefully, it will become "the ultimate A/C thread". It may take a while to post it all and it will have a slant toward 67s. 68s are pretty similar and 69s have some extra vacuum controls that I'm not as familiar with.
My thought was to cover in the order of: the compressor and brackets, condenser, receiver/drier, evaporator and suitcase, expansion valve (TxV) and POA, interior ducting, controls and vacuum lines, and wiring. I'll try to answer any questions as they come up so I don't loose track of them.
There are 2 outlets on the interior ducting that connect to the vent balls with flexible hose. I'll post pictures when I get to the interior ducting. Many parts houses sell a 3" hose as correct for firebirds, but the right size is 2 3/4". Ames Performance sells the right hose as part number FP562DM.
Rick's Camaro sells a 3-piece evaporator case half seal set. Part #AC-51 I haven't bought it, so I'm not sure what it is made of. I was planning on using 3M Strip-Calk to seal the case halves and the case to the firewall. There is also 2 seals where the evaporator tubes exit the suitcase. Rick's sells this as part #AC-53
The foam wrap is used to wrap and insulate a sensor coil on the expansion valve to the upper evaporator tube. More pics of this when I cover the evaporator. Ricks sells it as Part #RC-206. Ames has it for less as part #FP321TK.
Disclaimer - I'm posting links to parts as examples only, and not meant to be the best deal. Do your homework and shop around the various parts places. Pete