Get the whole motor/ECU/injectors/downpipe/intake/transmission. Measure the brake discs on that thing, and if they're bigger than yours, get all of those, too. If the rear brakes are discs, get the rear control arms, trailing arms, and e-brake cables. Don't bother with the power steering crap or AC, use the ones that are on your car (if equipped).

Take the throttle body off before pulling the engine (trust me). You'll break the TPS sensor if you don't, and you'll need a new throttle body if that happens. Pulling it first will save you a lot of trouble.