69 camaro owners please help

[anthony 69]

I’m building a 69 camaro The problem I have is all the panels are aftermarket the quarters, rear tail light panel and the filler panel. And I have all the panels clamped down ready to weld. But the trunk opening is about ½ bigger than the trunk. If the opening is the only problem, I can fix that easily. But I don’t want to weld everything in place and find out later that the rear window opening is wrong as well. If anyone can help with measurements from the top of the rear quarter peak to the other rear quarter peak, at the bottom of the filler panel and the same measurement at the tail lamp panel. And maybe the rear window opening across the top and bottom of the rear window I would appreciate your help.
thanks