340 crank in 318?

800hp is very doable. I'm guessing you haven't seen the 1000hp+ 4 cylinders. I'm kind of following a build from hot rod magazine, with some twists. They did an NA 318 and got it to 425hp. I figure I could get at least that with NA. Then through equations online I found with 11lbs of boost I'd have about 750-800hp. It would be able to handle it no doubt with water/meth injection, etc.

The main reason I want to stick with a 318 is for the simple fact people won't ever guess it, and more importantly, to prove the people wrong who think it's not possible.