Best ifs kit? rms, hdk, gt suspension, or magnum force?

I'll do some digging on that,I assume you're talking about the gt package, I seen a video on fb I believe of someone that had one, can't remember what brakes he's running, but he did indeed have a 58.5 hub to hub, with the travel, I believe his is adjustable like you run, which seems a lot easier to run a threaded adjustable bushing like most uppers now run, I'm guessing it makes fabrication a lot more forgiving. I have read and seen great reviews, but I have with every other setup as well......expect magnum force, a lot of bad, and horrible customer service. So I've eliminated them, and their price is outrageous! Hopefully I get a new phone next week and I can give you a call denny, my speaker decided it would be a great time to take a crap, so I'm dealing with social media now:/, I'm over it already! Haha