Hi Mike, Ubetcha on the inside of the doors. It was tight but the narrow stuff worked great. I cut the pieces to fit on the inside of the door skin, peeled off just enough tape to get them tacked and then peeled the rest...aligning them as I went. Made sure they were all tight against the door skin so there wouldn't be any pockets to hold water. Applied them vertically. I tried the wider stuff but it was impossible to get aligned and flat. Guess you could cut it down into narrower strips. I really like the vinyle-clad stuff used to seal the seams of aluminum roof panels, and it sure does deaden the metallic sound of the cab.
Dave