That seems so odd to me because the evaporator is picking up so much heat from the cabin. I suppose a guy should do the temp test, and have the fan on low or medium, and the windows open on the truck? Also, not have it on recirculate. Seems like you'd get maximum efficiency that way?
I still have to finish up my compressor bracket so I may be getting ahead of myself here. I made a list last night on some of the components I'm going with so far. I still have a lot of phone calls to make and more research to do.
Just to have it documented on here:
Compressor - Four Seasons #58140 FS10 style - R134a - PAG 46 oil - 6 groove pulley
Compressor adapter block - Four Seasons #12034 - swivel lines
Evaporator Core - Four Seasons #54535
Accumulator/Filter Dryer - Four Seasons #33182 - Inlet 5/8" Female Spring Lock / Outlet 5/8" Male Insert O-ring
Orifice Tube - Motorcraft #YG346
Cycling Pressure Switch - Four Seasons #36676 - R134a compatible - On 47psi / Off 26psi - 7/16"x20tpi
O-Ring Kit - Four Seasons #26717
Refrigerant Oil - UAC RO0900B PAG46 (R134a)
I have a pressure switch already but I figure why not go with brand new while I'm already ordering parts. I'll keep the old one for back-up if it's even compatible with R134a. It may not be, because I don't know if the Thunderbird had been converted to R134a or not, and the switches are listed as being different for types of refrigerant used.
I still have to call Four Seasons and ask them what size the Spring Lock fitting on the accumulator is, so I can order the right 90 degree hose end for that. I can't find that info anywhere online. Then I have to figure out the rest of my hose ends as well as what model of condenser I'll be using. I also have to figure out a way to plumb in a safety relief valve, unless one of the hose ends I end up buying has a fitting for one..
I'm hoping to do this entire thing myself, all for less than $500 - I'm going to give the el-cheapo Harbor Freight compressed air powered vacuum "machine" a try, as it's got good reviews online for as cheap as it is. Most people report it will pull down to 29" of mercury, but it just takes a while and works your air compressor pretty hard.
GB