In the era when 180 hp fixed pitch Pitts was the dominant aircraft in competetion, those engines survived 3300-3500 rpm for 1200 hours, which was the aerobatic TBO in that era.
The geared engines in various Lycoming powered fixed wing airplanes survived at rpm's in the 3500 range. The TBO on those engines was much lowere but not necessarily related to the high rpm. Aircraft with the geared Lycomings included Twin Bonanza, Queen Air, Aero Commander, P Navaho and Helio.
The IO-360 is type certificated engine. The FAA's Type Certificate Data Sheet is a nice thing to become familiar with. The FAA has TCDS available on line.
It does indeed list your engines RPM limitation. In all likelihood, you already knew it....its 2700 RPM. Some variants have some different limitations....I saw a 2400 RPM, and a 2900 RPM for the HIO variations. There are lots of other nuggets of info you might be interested in besides RPM.
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