Did you already offload the Ford? Why not sell the Chevy and use that $ to replace the motor. Ford has complete remans (with plugs and oil already in!) at reasonable prices. Some shops don't know this, and get hung up when they see long-blocks are not in inventory. But they never think to lookup complete motors.
Last summer I melted a spark plug, when things ran lean on a hot day from a plugged fuel filter (combined with a tuner). The electrode lodge in a valve causing that cyl to lose compression. I had planned on just pulling that head and getting it reconditioned, but the full replacement motor was such a good deal, that with the labor savings, it really only me $1,000 over just reconditioning one head. With labor, it runs ~$5k but comes with a 3-year unlimited mile warranty.