I havent seen too many body/frame swaps that were that presentable either. If you are handy enough to fab your own mounts, why not fab your own frame. You can get a front suspension set up from Hiedts reasonable priced and a rear 4 link set up also reasonably priced and these kits are well engineered. If you make your own, you can kick the frame rails up in front of and just behind the cab. It will get you as low as possible and you'll have suspension peices that are proven to work. This maybe out of your price range? But i truly beleive this is the safest way to go.
P.S. Hiedts or someone like that may even make a kit to go under your old ford. I would check it out. Good luck.