If you look on the inside of the cab you will notice that the rear inside panel comes in three pieces the center piece has the center rear glass in it. the two side or corner sections have the corner glasses.these threepanels are a perfect spot to cut out and relocate the two corner panels.TAKE THE OUSIDE OF LINES on cab your not going to use. cut on the inside of the lines on cab you are going to use. This will allow you to remove the spot welds with the small metal portions left on the piece your going to use. Now that covers the inside, now you are going to need to mark the outside so that you can cut the piece on the one cab just like the piece on the other. I used a 4prong dinner fork and bent the 2 center tines back against the handel of the fork and used the two outside tines to scribe aline about a half inch along and matching the curve of the rain gutter from the belt line up until I had gone far enough to go past the top of the window. I then scribed a lin with the same fork on the belt line using the seam between thebottom rear pannel of cab and the top this line long enough to go out half way between the center window and the corner window. I used a straight edge and a tape measure to determine the other two lines around the windows on each side of the cab. The whole idea being to make sure the panel you cut out will fit the hole you cut in the other cab. You will then need a wire welder so you can weld the pannels in without warping. Ive done this twice and it worked well both times. Now that being said you can think about this the way I have described it you might opt to remove the top the way your talking about, you may think im crazy feel free to go right ahead. If your 100% oposed to the use of bondo then I wouldn't start. If I get my photo share programs loaded back sinc3e my computer crash I'll try to send some pics......Ronnie