Also pay attention to the upper spring perch and how it will get attached & where it bears on.

I don't like bad mouthing people, but these guys earned it. GC sold me a bunch of stuff, helped pick spring rates & was very helpful, until I asked for assistance on how to get the new shocks they sold me to mate up w/ my existing camber plates (which I had made them aware of prior to ordering the shocks). At this point they basically said "sucks to be you" and I had to go out and have parts made to adapt it all. Plus it took 8 weeks and 4 deliveries for them to get me a 4 springs and 4 shocks, some of which was still not exactly correct, but I made it work.

The short answer is that when it came time for it all to come together they were not as knowledgeable or helpful as they first appeared, so be very clear on what you need and what it is they can provide.

Matt