Also in case your are wondering about a new flat panel made from a 4x8 sheet: It will look bad plus be close to impossible to weld in without real bad waves. The donor roofs mentioned above will all have a slight compound curve which makes it less likely to 'oil-can' or warp. Plus they will look tons better that flat metal.
30u, how did you handle the door hinge fitting? The reason I ask is that you said you bought universal hinges, and I would like to know if those came from Speedway motors? and what quality are they? I need some hinge recommmendations. Thanks