I reckon it is tricky to say until you see side by side but I purposely posted the chop pic by itself because it won't always be parked next to a gennie for comparison. What you can see is that the original roof is about flat on top, but not so's you'd ever notice...
The windows get taller toward the front, like a shark face on a P40. All I did was tilt the lid (roof + door tops) until the door window appeared rectangular, then lowered it until my eye did not "read" it as stock height. Stopped there. I intended to mark increments on the car and set up a reference pic for getting specific with window shapes, to plan my cuts via computer chop which is actual C.A.D., in a way. It will keep.
I'll get to what I actually worked on today, but wanted to say first thing I did (after pondering it on the way across town) was to write up a question and option list to start filling in my unknowns. That works great, by the way. Writing up the complex stuff for boss man. Anyway, I presented that and announced my intent to cut a side off the car today.
That didn't happen, but I did stick to my plan from Friday and got a mildly pleasant reward for it at the end of the day.
Also at the end of the day, I went ahead and popped the question important to me. Well, one of them anyway. Boss was on board with the making one big side panel idea from first mention. The one where I attempt to make one big piece that can be cut up to make a door skin, quarter patch, and cowl patch. From the belt down.
Since then, I've waffled and mentioned buying door skins. So I outlined the risks and expressed the will to do it either way, and some tenative confidence that I will succeed. Well, dude who has done all the 30s car stuff was in favor of the big panel to begin with and still thinks it could be a win. So what I'm saying is the response was favorable and when the day feels right...
...just wait and see.
Slick wanted to be sure you saw the Cat CAD happening here. He will use some 3/16" thick, 4" wide flat stock. I can think of a couple other ways to do that, but figure this design would adequately serve as a crush cap in a collision and allows the use of stock bumper brackets. Simple but pretty.