When i had my Z6 motor boosted i made 283 to the wheels with the vitara pistons on scat rods. I was boosting 14 psi daily, but i never really ran it hard. When i came to Ga, i sold m motor too a guy on here and the was still running strong.
It all depends on your goal for hp man. If you go with those pistons, you will have piston chater. It goes away when the car is warm. But not all of it. It's normal. Just tell everyone that your car is diesel. LOL!! But g/l on your build man. For a low budget build, it's worth it.