You are way overthinking it. The block is the limiting factor, buy a .030 over rebuild kit with a forged piston and a name brand rod. Put a cheap set a gt40s or gt40ps. Buy a set of stainless shorty headers (summit had some for like 149) install them backward and build a y pipe. Buy a 300 turbo from chad and a ebay intercooler. Cooler pipes can be made of steal to keep cost down or have someone with a tig make aluminium ones if you want. Ford harnesses are separate from the cars wireing so you can buy a engine harness cheap and go efi cheap. Basicly with boost on a weak 302 block buying quality race parts only makes xpensive garbage when splits