I will eventually get both adjustable upper and lower control arms, however at this moment I can afford only upper or lower. If I want to have the best impact on getting more positive caster should I get uppers or lowers? Thanks all!

 

Lowers First.

 

Either will work. Shorten the uppers or lengthen the lowers. But front lowers would be the better choice for someone only doing one set.

 

Issue is many aftermarket control arms will not go shorter than stock length.

Michael @ Level 10

 

I have seen a few posts about Currie's arms not going short enough for taller lifts, are there others? The OP has a short 2.5" with a small spacer, I can't say that I have seen any posts where uppers-only was a problem at that height. But again, I do agree that lowers are the better choice.

 

I need to update that I'm at 4.5 now

 

At around roughly 3"-3.25" of lift as stated in your signature? You should be fine doing a set of lower control arms to get your caster back into spec. But you could do either or, we like to do lowers first, our lowers are high clearance bent and solid steel so you gain more benefits from doing the lowers first other then just caster adjustment.

RK