Not sure why so many are telling him he can't make that power when it's documented that he should be able to do it.

He said XP or S1X with rockers. To me that means he's probably talking about 1.8 rockers. I think this way ....because I've done it. My build from the Bonne was nearly what his plan says with lower compression and he won't have the IC right away. He'll need a lot of supporting items like the trans, etc etc...overall though. It's possible. Todd Allen of Intense had the same basic build (with IC and low compression) dyno'd to 467 CHP IIRC. I did not dyno my car, therefore won't say it had X power.

OP Depending on where you source the parts, you may end up in about the same cost area that you would if you found a nice used turbo kit. If you have some time, I'd suggest watching for both SC and turbo parts. XP works great with a turbo as does an L26 and a bunch of the other parts.