Well in theory a stock motor is IT prepped, so anywhere you can get a stock or used motor you should be good to go. Don't forget to add all the required safety equipment, check a GCR for those requirments. Now having said that you may not have a top tier competitive car. To get a motor prepped to the full extent of the IT rules, you will have to build one, or find a local shop willing to do so. There aren't any fully prepped KA24d motors lying around to my knowledge, but who knows, maybe someone on this site can direct you to one. Good luck

Tristan Smith
ITA 240sx #56
ITB 200sx #58

[This message has been edited by Tristan Smith (edited April 04, 2002).]