Like he said Larry is the man when it comes to 2JZ motors. GTE or GE. He did Hulk Hogans Supra as well as many other monsters in the area. The NA block is the same as the TT just without the oil squirters but its nice they are giving you a new one. As for the SC headas long as they put a 3mm headgasket in 20+psi should be no problem on C-16, shit I run 24 psi on 100 octane. Any way sounds like its going to be One bad IS, can't wait to see it on the street...