There is no need to do this unless he is running some new performance wise IE Cams, Cam gears, new internals. Also he would need an EMS (Engine Management System) to tune the car by. Honestly man, if he swapped a stock motor in there (Ls,GSR,B16, B20) there is honestly no reason to tune it. Now the best someone can do is a leak down and a compression test and check for any low compression. Also we can check for any leaking gaskets. But other than that tell him to save his money till he does a few more upgrades.

If you have any further questions please feel free to send me a PM and I can walk you through any help you may need.

Kris