Over on Inliners a new 292 build similar to yours was dynoed at 285hp and 310 torque "right out of the box" as quoted. There is plenty of room for an increase in both values. His ran a single 4 bbl.
Yeah, I haven't been to the sight lately...mine is expected to make that or more...I built it to specs more around 310 hp and 330 torque. So...All I know is it'll be one heck of a sweet engine! lol