I had 2 LS engine setups, one turbo and one all motor. I use crower cams in both. I had crower 404's on my all motor setup, but with those cams I had to raise my compression ratio to 11:1, and upgraded my valve train. It was a big difference over all. Loved that 8500 redline. If you want to get cams most likey you are gonna have to change your springs and retainers.