the roof is off a panel truck. I cut it at the a pillar 1/2 way up the windsheild and used the door frame of the panel to match up to where I cut the original b pillar off down low. I left 6 inches of the panel truck on the b pillar. I then took the original b pillar from the cab over and flipped it side to side and used it as the back part of the b pillar. My rear doors are two doors that I used the rear portion of both so it would line up with the shape of the flipped arounf b pillar. The rest of the roof was the back portion of the panel roof. I think I cut about a 2 foot chunk out of the middle. The two roof halves did not quite match up so I had to slice and shrink the rear section to fit. I also had to trim it to match the rear of the truck roof of the second cab since htey were a slightly different shape. Its kind of a learn as you go process. I do not have any pictures of the b pillar but once it is completely installed I will gat a few posted. I am trying to get the entire passenger side put back together than start on the driver side. I did not even start on a door for that side yet.