Stock Heater Options

[blown240]

I plan on putting AC in my Panel, but I wanted to see what the difference is between some parts I have.

Right now my truck has this heater:

The blower works, but its weak, and I'm missing the ducting for defrost.





I have this in my spare parts:

I was told that this was for trucks with A/C, but I don't see any AC lines going into it. I am missing all the interior parts.






I also have this. Its heat and AC, and R134. But its really tiny, and probably won't cool a panel truck very well.







I was thinking of making a new face plate for the newer unit, and mounting it like an under dash unit. It would at least blow cold air, even if it never really cooled too well...

Thoughts?