67 A/C heater box rebuild and install help

Might have to shoot some kind of cleaner in the evap core fins. Mine was pretty crudded up with white powdery corrosion. Do you have a compressor with an airgun? When mine came apart there was so much flaky **** in there I needed glasses and a facemask.

That's the only way you'll be able to get the evap core out is to remove that probe....unless you cut a channel to the nearest edge and extract the top cover and core as a unit...and that's not exactly what I'd refer to as a good idea.