Since you're just doing autox caster isn't very necessary, it's mainly used for road racing or gt racing. If you wanted to adjust it you need a machine, and make them as even on either side, same with the camber, and then adjust the toe last.
The forward caster makes the car easier to drive daily, if you adjust it back it will help the grip in corners, especially at low speeds, but it will make the car walk and pull all over the road on daily driving.
My advice is just to leave it alone unless you want to risk ruining tires. I'm assuming you're driving to the track, so imagine the wear on the tires to and from the track. And how soon can you get it back to a shop to re-align it?
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'13 5.0 in deep impact blue, "The Blue Goose"
A few mods, just a daily.
94 F150 302
New project, thinking built, procharger, powerglide, tubbed, super sleeper 
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