69 fastback on a 2011 GT frame?

[TreySmith]

Was thinking about how cool it would be if I could get a 69 fastback with the 5.0 and new interior but then it clicked, why not drop a fastback body on a new frame?

Are the dimensions close? Could it work? I know someones done something similar before but I think they just welded old school panels on an 07 gt.

I'm thinking a salvage 2011 GT, cut body off but leave a lot of the pillars and firewall then splice a 69 body on top.