Here is the thread if you want to run this ITB setup on your car (you do need a standalone and run a map based system unless you make a custom air box enclosure):
Nissan 240SX Performance Modification/KA24DE and KA24E/ITB's - Wikibooks, open books for an open world
No money saved on selling without the injectors. The ITBs alone i purchased for $250 and this includes all the modification needed to be fitted to a KA24de. I had this setup on my 510 before we switched over to SR20. We did not finish dyno tuning before switching to the SR20.