Engine fuel requirements and engine types

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Hey Guys, I was hoping to get some help. I'm presently thinking about swapping out the D16Y8 engine in my 96 civic si for something more powerful, maybe a B16 but I have a list of criteria that I want for the new engine. I wanted something with around 160-170 horses, and that's descent on gas. But here's where I've been having problems, I want an engine that runs on regular gas and not the higher octane gas because I drive about 100 km to and from work each day and that would get expensive the way gas prices are going. So does anyone know where or how I could find out what engines take what type of fuel? or can someone suggest engine types that meet that criteria? Any help would be appreciated.