Camaro quarter to roof

[nkopper]

After what seems like an eternity, I've finally gotten the passenger side repro quarter on my '69 Camaro nearly ready to weld on. One area I'm uncertain how to fix is the 4mm gap between the roof and the sail panel at the top of the window channel. The only way I can think to fix it is to cut the quarter, bend the window channel in, and weld a filler into the quarter, but I don't like the idea of welding on the edge of the sail panel. Anyone have other suggestions on how to fix this?