I have found a modern A/C evaporator core than based on the dimensions will fit in the factory heater box, I will update with more info and do an A/C thread when I have confirmation. My goal is to just run one evap core with all R134a parts and a well sealed cab/re-circulation setup and not need a second core.
Progress is slow as this is finals week. Not sure if I mentioned this but my buddy that was over helping Fab'd up a custom intake plenum to use a 6bt heater grid so that is ready to go on sans gasket(s).
The one chance to cut the rest of the grille was a failure as somehow the file was an inch taller. So I am hopefully cutting the final piece tomorrow. Steel is not cheap when you don't buy a full piece
