so you want to build a cabinet to play n64 games with arcade joysticks and buttons? the n64 controller has
3 triggers, dpad, 6 action buttons, start button, and an analog stick., so you would need 14 inputs per player, plus an analog stick.
just out of curiosity, why not play them with a gamepad? it would be much more natural. there are adapters that allow you to connect n64 controllers to your pc via usb, i have one and it worked ok.
a modded xbox is also a great option, the n64 emulator works relatively well, and the controller has enough buttons..although due to the wacky nature of the n64 controller, there is a little adjusting involved.