I have a Gibbon 3-window. None of the wood is level or plumb. The underside of the body was totally unfinished. Overlaps on the underside where the body joins the floor pan and where the trans tunnel joins the floor were not glassed over - just a raw overlap.

The tunnel wouldn't clear the transmission - even after they "fixed" it. Gibbon tries to make their case for chopper-gun bodies, but I'd never get another chopper-gun laid body. The body glass varies in thickness from 1/4" to over 1."

I tried to get the window glass out of the doors to paint the car, but the track is glassed in, and I'd have to tear it out and rebuild it. The wood bracing in the trunk goes every which way, and there's no way to install upholstery panels there without a major woodworking job. I had to completely rebuild the window trim moldings, and they still need a lot of work.

Check the level in the attached photo. The level is level. The wood is off by over an inch in 42".