My dad has a whipple on his 98 sierra w/350, those rock!! don't worry about whats required because the kit comes with everything you need including secondary fuel pump, all plumbing, and electronic add-ons. The thing hauls balls. Before my SS I had an IROC, when that IROC was basically stock with flowmaster, that truck would seriously beat me in acceleration hands down. The whipple is definitely the lowest maintainence most reliable of all for these trucks. A very high quality product, high adiabatic efficiency. Its an easy answer for power, but expensive. [censored] for 4k you can do heads and cam and a whole crap load of other stuff.
1977 fullsize pickup,350ci. edelbrock carb, headers, oversize radiator, 4sp SM465/NP-205, 12bolt, 6" lift, 35" tires, cd deck, 2 amps, Bazzookas, 2 gas tanks