Installed the unit back into the car.... This was fairly easy.

Underside still slightly damp...

So i used this...
Now FORD says (tsb) to Solder a ground wire to the new heater core to prevent the aluminum from corroding (dissimilar metals). So why didn't they do that already? Because they are dumb. I do not know how to solder alumium so this is my solution. I went to home depot and got a ground rod clamp and some new bolts but 5/8" length.

Did not over tighten so as to crush the tubing. There is about 1 tread showing on the otherside of the clamp. Used some thread lock to prevent backing out. I need to find some wire that will be good for grounding.