TPS comes built in, you just have to wire it (easy). All the rest of your sensors are now trash, sans IAT. MAP doesn't work quite the same way with individual throttle bodies, so you need to gather your load information from your TPS.

I purchased an airbox that goes across the top and has a 3" inlet on one side. I'll be running that to my wheelwell like a conventional CAI. You could also grab a carb filter and fit it to the airhorns.