SC, TB, one more SC base bolt (you'll have one that is too long for the new SC), MAF sensor, SC and TB gaskets. Scan tool and possibly a wideband O2 sensor, AFPR and fuel pressure guage or Air-Fuel Calibrator (AFC)
Difficulties you will have:
EGR tube-to-SC inlet joint will likely leak. Gaskets have been made from portions of EGR valve gaskets. CAR WILL RUN LEAN!!!!!!!!!!!!! The PCM won't properly translate the MAF signal. You'll need to scan or look at your new wideband O2 gauge then tune the fuel or MAF signal. So you know, AFC'* (particularly the one that ZZP sells) have reliability issues. I had 3 die then switched to an adjustable fuel pressure regulator.
Getting it done right requires the money spent on the other equipment to get the tune right. You'll also want everything else to be "up to date" to further help you get the tune right.
I've had mine on for 4-5 years now and still don't have it tuned perfectly.