Sorry just now getting back to this. Thanks again to everyone for their help.
After I spent a little more time trying to decide exactly where to slice/dice, I realized where the damage had been done to the door shell and was able to pretty effectively coax it back to shape with hammer/dolly (actually proud of that, slowly learning metal bumping). Once I hung the shell again, I was pretty happy with the results.
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I have since put the shell on and hammered the edges (that also went surprisingly well, rubber coated dolly is a must), and have hung the door to check fit/gaps and tweak positioning before tacking it.
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Before I tack things down though, my one concern is the alignment of the mounting tabs for the window track. I put a bolt through the hole at the front of the door to help keep things aligned, but this is how the tabs on the rear want to line up.
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The door seems almost perfect in this position, if I tweak it to make these align better I feel like I'm making the door fit worse (warping it front to back). I did test fit the cap screw that goes through there to the window track, and it does have some room to move front to back, but as you can see I loose a good 1/8" of adjustability. Unfortunately I didn't get a good picture of how well they were aligned before I removed the original door. At this point there's not a lot I can do other than try to grind these out a little. Curious if anyone else has dealt with this.
Thanks as always, couldn't do this without FBBO.