Hey Frank, welcome to the forum! First off, you might in the future to post your own new post. Your piggybacking off a three year old post. Anyway the rears use air springs, any of the ones listed on rock auto will work. As far as shocks, everybody here has their favorite brand and model. Kyb has a close to oem ride, and works well. Ford originals are long gone from dealer, and motorcraft doesnt behave right, I know I've tried them, along with bilsteins, very choppy ride on my 2000 4x4. As far as lower ball joints we like Moog. Their press out, and in and are grease able. The uppers are best to replace the whole arm/balljoint assembly from Moog. I believe their better grade stuff is called problem solver. Dont know if your wrenching it yourself, of have a mechanic perform. Well that's my 2cents on your baby.
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