Yes it looks like there is quite a bit of material missing on my core support, and a replacement probably is a good option. A few all GM car shows will be happening this Spring that usually include a decent swap meet, also, "Back to the 50's" weekend here in St. Paul includes an all day swap meet on Sunday of that weekend. However, I feel I could repair it enough to make it look close to the pictures that have been provided. I'm not in an immediate rush for it, and will do some searching for a good replacement. By getting a good core support in place, will that change the front sheet metal fitment? Surprisingly it doesn't seem that bad, but after learning what I have through this correspondence, I think it will change and hopefully for the better. Any thoughts on that appreciated. Thanks again everyone.

Tom