This is simply incredible! If someone had told me this was an unused model from 1976, I'd totally buy it!
For anyone familiar with the old '90s era X-wing video games, the central location of the cockpit reminded me of the YT-2000 seen in X-wing: Alliance. It looked a bit like a cross between this concept and some heavy YT-2400 influence, like the Outrider. The cockpit interior layout was totally different though, with only two seats, and arranged in a tandem arrangement with the rear seat positioned higher than the front.