Originally Posted by The Spectacle
LS pistons will not bring the compression down enough for the power levels you want to acheive, the easiest and safest way to accomplish this is using forged pistons and rods.
With a good tuner and all the right parts however, I believe you can get that stock motor up to 260whp-270whp.
You can get that stock motor past 270WHP. My teg is stock motor and is making 350ish WHP
Just do 9 PSI and a 30-50 shot and enjoy the set up. If not just buy the forged internals from CMS
Forged internals will be the safest way and let you sleep easy at night.
Kris