...Ramsey I would love to know what the caster should be set to 7%?...
First, it's measured in degrees not percentages. Here are the specs for a 95 F350 TTB.
Camber 0.0° +/- 0.5°
Caster min 2.0°
Caster max 4.75°
Total toe 0.06° +/- 0.25°
Camber split 0.0° +/- 0.4°
Caster split -0.5° +/- 0.4°
Here's a pretty pointless article from fourwheeler.
http://www.fourwheeler.com/how-to/1212or-kopycinskis-brain-changing-ford-ttb-camber/
Here's the bushing you need.
http://www.amazon.com/Moog-K8709-Caster-Camber-Bushing/dp/B000C544QO
I set toe with a tape measure. 1/8" in works fine.
Set camber with a plain bubble level. 0° is ideal. Lifted TTB tends toward negative unless the rear is loaded heavily.
Caster I set with a magnetic angle finder. 4° drives nice.
It's really not rocket science. Only hassle is getting the stock bushings out. Air hammer makes it easy. My truck is only used when it's needed (not a DD) so I align it with weight on board. You just need a level smooth surface, half a tank of fuel, accurate air pressure in all four tires, and go for it.