5.4 GT500s are 4 valve, that intake will not swap, there is no OE Ford 3v supercharger manifold. Department of Boost sells an intake manifold to put a GT500 blower on a 5.4 but they themselves state they haven't actually installed it on a truck and it's every bit as expensive as any of the other options, and the Eaton M series blowers are nowhere near as efficient as the Eaton TVS blowers available now.
Whipple appears to have discontinued their setup, that was IMO the best one going for the 3v trucks. Edelbrock still sells their TVS based kit, it's about 8k though.