George, You're NOT gonna push 900rwhp through the stock 2JZ repeatedly. Email Peter Blach, he has experience with exactly this. And he will tell you that 900rwhp is the limit, it will only last a few runs at the track(the real world). Did you talk to SW? Last I saw SW's car was forsale witha "new" shortblock. :-) BTW Peter's car is for sale too. Almost every big hp supra that you know about has gone through stock blocks.