alignment questions after lift kit

[aggiedave98]

I just put in a fabtech 3" lift on my '89 suburban 2wd 1/2ton (and rebuilt the front end in the process). Thanks for all the help over the last couple of months as I gathered info on it.

I went for an alignment and the guy told me that he removed all the shims to get the camber in spec, then added a few to get positive castor. First off, why do the shims affect castor? Secondly, he told me that it's pulling to the right a little, and that's the best he can do w/ the lift kit in there and still keeping the camber close to in spec (he has it barely out of spec on one side... 1.3 instead of 1.2max).

It definitely pulls to the right a little. Is he right??

BTW, the lift kit was achieved by a ball joint spacer on the top and a heavier spring (fabtech 3" basic lift for 73-87 chevy 2wd trucks).