I have an 07 with stock springs...i want to add the relocation brackets and billet lca's by Motoblue..there are two hole settings for lca's...which one is best for stock springs...i got them to help with loss of traction and fishtailing when hitting 2nd gear...hope these plant tires a bit better

 

You want them level to the ground I believe. Stock form they should be pretty level, the brackets are only going to change that. I think you only need the relocation brackets if lowered.
Im sure someone will correct me if Im wrong.

 

Here's a good LCA 101.
http://www.cherod.com/mustang/HowTo/LCA%20_adj.htm

 

Thanks for the link...

 

wow! cool article. i wasnt the one who asked for it, but thanks! now only if they had a video format.

 

Nice article, explains everything pretty well, good find!