how much boost can be safely run on a stock block.

i have a 93 2.5l with 125,xxx miles 5 speed and i was wondering what amount of boost can be ran on these motors. i just got the car and im not sure about its abilitys. thanks

the KLZE has flat top pistons so i would say your better off advancing your timing to run premium fuel and polish the intake and you will have as much power and boost and be cheaper for you. If anything run nitrous before turbo