318 engine build help

500hp only with a 100 shot of the juice. You need to base you build on 400 and then shoot it with 100, you will not get 600hp out of a teen. My buddy got close to 550, but youll put way to much money into it. The 400hp, is easy and not that expensive.
My is 425hp and is as follows
318
KB167 set to zero
airgap
Voodoo 403
eagle i beams
Eddy heads
windage tray