im just about to start the build up of my b20 in my LS. i plan on running a decent amout of boost (about15-18psi). i've been told by several people that a b20 can handle that on stock internals. i've always felt that at least forged pistons would be the way to go. this is my first turbo build and i dont want to be walking a thin line between boost and break. any input or past experience would be appreciated