Just an FYI if you have the older version SLR UCAs & cannot get caster alignment to spec; or if you need too much lift to get camber in spec.
Here's my story:
After ~1.75 years***, I called SLR & they replaced my UCAs with new ones (tubular, not econ) for $120 + shipping (what they considered the cost of the ball joints & bushings). I put them on this weekend, & today my alignment shop got perfect, factory spec alignment with no trouble at all -- & with plenty of UCA bumpstop clearance & good CV angles as well. All in all, I am VERY pleased that SLR worked with me on this after so much time had passed since my original purchase.
So, if you're sick of a crappy ride (I can't believe how many freeway miles I racked up with NEGATIVE 1.2 degrees of caster & t-bars cranked to all hell), but thought you had no choice but to pay full price for new lift arms, you may want to give them a call & see if you can work something out.
It's too bad that SLR was not proactive in confronting this issue originally (caveat emptor, though, I suppose), but this worked out as well as I could have hoped for considering I myself wasn't very proactive with the problem...My only other issue with the whole deal was that it took 2 mos to get the parts when I was told originally to expect ~1.5 weeks.
***NOTE: Why did it take me so long to do this? At the same time that I put on the SLR UCAs, I also put in SAW T-bars which took a very long time to settle (every time I though they had settled, I went to the sand dunes & found out otherwise). As a consequence, I didn't get a good feel for the align-ability (or lack there of) of the UCAs for quite some time...& by then I thought I was plain SOL. But finally one day I said "what the hell..." & picked up the phone.