That Mopar Action article is COMPLETELY WRONG about the FMJ spindles. They do alter geometry slightly, but most folks will never even notice the difference. And if you are driving hard enough to notice the difference, then you'll notice the improved camber gain a lot more than any of the toe gain. It is useful as far as a parts list goes, if you ignore the comments about the FMJ spindles.
But you don't have to believe me. Mopar Muscle actually studied the geometry changes and published everything in this article. Bottom line is, you can use FMJ spindles without issue.
http://www.moparmusclemagazine.com/techarticles/suspension/mopp_0503_swapping_a_and_b_disc_brake_spindles/index.html