Yeah, the pieces under the dash are shop-vac accessories from True-Value. The hose is made for heater/defroster usage. Got the hose on ebay I think. The right-most part in this picture.
Secured under the dash with black-painted screws from the top. The area under the aluminum is all painted black, makes it look factory. And the shop-vac pieces are a bit larger than the aluminum, only a small area was cut out of the fiberglass.
I forgot to say skip the A/C in my post up above. IF you have a top(and it is a true EMERGENCY top at that), the A/C will get lost in the open air. The heat though is very effective, 8000 Btu and a half-tonneau make you comfortable down to the low 40s. If you ride with your other half in the cold, neither one of you will be comfortable.