[69BBsuburban]

Well...since your limited with tools....you can make a patch using a wood block as a "buck" to hammer the edge over for the flange. Once that is done, pie cut the flange so you can bend the panel to fit the contour of the cab. But you will need a welder, or a freind with one.

Or.....cut the piece from another truck....many wrecking yards will let you do that if the rest of the cab is junk..