6112's and Camburg UCA's alignment

I cannot get this aligned properly. I first took it to Firestone and they refused to set it to anything other than O.E. specs. I finally got it in to 4WP and they told me after the alignment ( which was better) that they couldn't get the caster right. I cant find the specs page but, when I turn past a certain point, I pulls further into the turn and scrubs the tires really bad. the outside edges of my tires are almost bald now and I need new tires. I need to correct this issue be fore I do.

2014 CM 4X4
I am currently running 6112's on top setting with a 1/2" shim and Camburg 1.5 UniBall UCA's.

When I first left Firestone my caster was 6.7* and camber was -0.1 DS and -.06 PS

4WP is blaming it on a mix of 6112's and the shim. Suggesting we try again without the shim. I need the height for work ( I drive around jobsites all day and sometimes drag the belly). They then suggested a 6" lift. So now I'm looking at a 5k pricetag with new tires. I'm not against paying that if it is worth it. I also like to keep money IN the bank too if I can help it.

The bottom line: I need help from folks who know what they are doing to help guide me to not spend money recklessly.

If i have forgotten to add any specs, let me know.