so I picked up my 46 this past Tuesday,started tinkering last night,looks to be the original heater in the truck,but I noticed there are slots for the defroster in the dash,but no duct work up there I looked in the catalogs I have and just found the 1-1/2" dust tubing shouldn't there be some sort of a sheet metal duct on the dash,i do see a couple of screw holes up there any help would be greatly appreicated
