[68LSS1]

I have the Stage III kit. With the stock spindles (supplied with kit) it's good for 5" of drop. Could get more with dropped spindles but I didn't primarily get the kit for the drop-that was the third reason. The first, get rid of a bunch of weight. The second was to update the suspension. I plan on driving this everyday and I want it to handle great and wanted rack and pinion steering. The third was to drop it but I'm not going for the "bagged" look.
As far as why anyone would not recommend it, I don't know. Some say the Mustang II ball joints are too small for our trucks but that is a bunch of crap from people who don't know what they are talking about. Those same ball joints are used on many mid and full sized Ford cars. You get unequal length A-arms which is about the best front suspension that you can get for handling. And as Fatman says, "Don't buy our kits if you're building a trailer queen. Buy our kits if you are going to drive it." There is quite a few drag cars running Fatman set ups as they have been around a long time. The Stage III kit looks great too. Polished coil overs and tubular, polished A-arms. I probably have some pix of my set up temp installed I could email if you are interested. Also MOTHERTRUCKERS is an authorized dealer so he can probably save you a few bucks. I do agree that if drop is what your after this would not be the way to go. But try to find some others who ACTUALLY have one.