these rb motors are stong as fuck, even the small rb20 2 liter inline 6 they can take alot on stock internals, This guys in on the rb fourms and finally got his stock internal rb20 to the track. she runs good. btw these motor swaps are less then 1200 bucks for half the car. he has alittle less then 5k in the whole car.
http://www.youtube.com/watch?v=-1oqnfuDHdw
Stock long block down to the stock oem headgasket. only mods are turbo, injectors, fpr, and tune everything was bought used on a budget.