I mounted the evaporator under the dash. This was one of those projects that I was not looking forward to but it went in very quickly. I just made the template and cut the holes.
Then we went back to the plumber for mor parts. I cut a 3 in piece with fittings and it fit under the dash beautifully.
I cut the holes in the chassis to run the ducts and installed the parts.
The defrosters will be drilled when the dash is fitted for the last time. The size of the holes will dictate the amount of air flow. I don't think I will need very much but at least it is there.