The IFS kits seem to be pretty expensive after you get all of the work done. I've seen complete rolling--minus the wheels--frames for $7000-8000. That seems like a better deal since you're getting IFS, rack and pinion steering, power disk brakes, a rear end with many gearing options, and a brand new, stronger frame.
I would rather spend the extra $5000-6000, and get everything new, than spend $2000-3000 and have to hack up my old frame; but that's only my opinion.
I am inagreement with the people who are saying to get the truck running and see how you like it first. I wanted to start modifying my truck with all kinds of things, but I decided to do safety and reliability stuff first. Now I'm pretty happy with it.
