There's 2 flat circles on each side of your front differential perpendicular to the output flange. You can read pinion angle pretty closely off these.
From pinion you get caster.
Stock = 2 degrees positive pinion and 4 degrees positive caster.
If the circle measures 1 pinion = 5 degrees caster.
Pinion 0 = 6 degrees caster.
2007 JKR | PSC Big bore box | Rock Krawler 3.5" x-factor arms l SteerSmarts YETI track bar, tie rod, no drill flipped drag link, Griffin | Synergy frame brace | 37x12.5x17 Nitto RG's | Dana front DS | Fox IFP shocks | Artec front armor kit/Currie JJ's | Teraflex rear axle bracket | EVO Rockstars | Ridged D's, A pillar mounts | VKS sliders l Trek Armor seat covers | Superchips/Sprint booster | Savvy half doors w/ Bestop uppers