The only parts usable on your truck from that kit is the lift blocks and MAYBE some of the bolts. That's it. Front bumper brackets, rear bumper brackets, steering extentions will all be different. Those happen to be the most expensive parts to buy seperately. I didn't bother clicking the link.
You're WAY WAY WAY WAY WAY better off just spending the $160 or whatever for the Summit lift for a 98-00 truck. It'll fit yours and it's been confirmed time and time and time again. The only differences between 98-current is the fuel neck filler tube and fuel neck vent tube diameters.
Link to Summit kit: http://www.summitracing.com/parts/SUM-7888300/
We have a bodylifting section... you really should check it out and the sticky at the very top of the list of threads.