Custom frame questions

[yfz450_0569]

I'm building my own frame front to back, and using a 2x4 and 1/8 tubing. Will this be strong enough to handle about 500 to 600 horses now and up to 800 possibly in the future? Not all of you do this stuff but maybe you have some idea. This is what other guys use but idk if they run this high horepower. I already built the frame most of the way but still not too far so I can't redo it. I think it will be strong enough with enough crossmembers but I wanted to know what you think. Thanks