Originally Posted by SPOHN

Don't get me wrong I love the SPC kit also. Even had one on my 350 also. I've never had an issue before either. But if both kits were out I'd probably choose the SPL front arms over the SPC. The SPL is a little easier to adjust and hold your settings while during an actual alignment. You just have to tighten the top nut more and I assume the locktite will help. But even then it CAN slip due to its design. Probably more so if you hit a bad pot hole. But even then that could threw any kit out of alignment.