You are absolutely correct on that. I put a set of Classic performance parts drop spindles from summit racing on my truck last night. The thing to watch here is that if you go over a 2.5" drop is that you cant run a 15" wheel without modifying the lower control arm. Specifically the lip at the outer edge of the ball joint has to be ground off. Now this part is just my opinion but grinding away the stamped part of a control arm right next to a pressed in ball joint is just bad form, a lot can go wrong here. If you require more than a 2.5" drop then you need to think about wheel choice etc. Like i said i just did mine last night, and i'm not quite happy with it. Needs another inch or so, and I'll get that by cutting just a slight bit of spring.