no need to be a jerk. Its comments like yours that ruin discussions thinking you know all and that your shit doesn't stink?
Tell me where you've seen a standard RB26 head, and a Standard RB30 bottom make over 400rwkw?
Not a chance.
My best mate, not a guy that I barely know, a guy that I hang out with all the time, visited his car on the dyno, raced beside him down the strip, and uploaded his videos onto youtube for him has a stock motored Supra making 450rwkw. no aftermarket cams, nothing. Head hasn't NEVER been taken off. Compression test revealed the engine being within 5% of a new motor, and it runs 10's in a car that weighs a lot more than a skyline or VL turbo.
we are looking way too much into this - a guy wants a cheapish reliable motor to make big power and the 2jz wins in that regard hands down.
He's got a choice - spend well over $10,000 on a RB26\30 or spend less than that for a motor that can do the same, standard setup.