360 Rebuild Horsepower Potential

Yeah, there's a ton of variables missing. I would be more conservative given you're not providing info on the level and quality of machining or other parts. I'd put it around 325hp at the crank. If the short block and heads are blueprinted, and performance quality work and parts are used, and the exhaust is headers and a good system, and the carb is close to right, and you can tune, it should be stronger.