Checkout Caster and camber

You don't actually need a caster/ camber gauge. You need a "camber" gauge and nowadays you can buy digi gauges from hardware stores that read degrees tilt off level. You calculate caster by rotating the tires in and out I forget, 20*? take the difference and multiply X 1.5 and that is your caster. The point is if you get a good buy on a caster/ camber gauge you can use, great!! Mine is an aging Ammco. But you can build one cheaper if you can fabricate