Power for a slant

For 200HP in a mild slant I think that you're talking super or turbo-charging. That's doable, but probably not where you want to take it. Run with 805's suggestions and see how that works for you.

I'm slowly adapting a GM Throttle Body Fuel Injection system to my 170. The wiring isn't too bad. I'm two big steps away from trying it out, so likely won't happen for another couple of months.