I believe the intent of this thread is for Factory stock long block motors. No aftermarket guts. All the blower/nitrous/turbo you want on stock internals. Given that criteria, the GT/GT500 5.4 will stomp everything else. The 2JZ can't hold a candle to what that motor will do, stock for stock. The '03 Cobra motor is a good choice, but the 5.4 will beat it every time by at least 100-150rwhp.

A hemi with a blower always makes killer power, (top fuel?) but with the stock rods and pistons they came with back in the day, you better have a diaper ready.

The RB25 26DETT, are cool, they make good power in stock trim, and for their day, (along with the 2JZ) they were the king of the hill by far. However, today, that GT500 will wipe it's ass with all of 'em.

Brian
EFI-Unlimited