That depends on whether you will run carb or EFI. Yes there is the injected 5.9l but a fair number of the carb versions around also.
The Gen 3 is injected with DoD and variable cam timing. Those two are trouble spots and should be deleted. Then if you want a carb, you need an ignition controller for sparks. Once you choose EFI you need to be proficient with electronics and wiring. There are kits out there, but will add cost.