Here we go again...
I got called every name in the book including being an instigator when I asked if a vinyl roof will "help" or "hinder" the appearance of the awkward roof line. Of course the car is going to have an awkward looking roof...It's a 4DOOR SEDAN Cuda for heaven's sakes... 
I don't think you'll see finished photos of the car posted here, but I'm sure they will be found all over the internet when it's done. 
At risk of sounding like a basher, before this thread got off track as some would say, ECS invited others to provide thoughts, ideas, and suggestions on the project in order to tweak and re-evaluate the design. So I agree with Alan on this.
Without a doubt the challenge to construct a vehicle with (for lack of an less offending word) "jig-saw" parts and panels is extremely difficult. An extreme amount of credit goes to the metal fabrication guy to make the doors and roof fit together.
Removing B Body sheet metal sections and welding E Body panels back into their place leaves the car looking akward from the side view - - in my opinion.
With regard to reconstructive measures, I don't know if there was any leeway in altering the roof line because the B-body doors and side glass appear to have the same dimensions as the 4-door donor. I'm also not sure if the B-pillars and door frames were altered in some way to keep things matching and closing properly? If so it doesn't appear to be much. It must have been a real challenge especially considering the side glass which was used from the 4-door.
Looking at the photos it doesn't appear that the B-pillars or door frames were drastically altered or ("chopped" as some would say). With the scope and profile of this project it seems this could have feasible to correct the 4-door sedan roof line view of the side profile.
They nailed it on the rear window. That's definitely 'Cuda.
The side profile. Not so much. I suppose this is the best case scenario given the extreme unreal metal working talents shown by Steve Bean the fabricator.
