Hard to say without a few more specifics. Was the block zero decked and squared to get a true compression ratio of 10:1, or are the pistons laying down in the holes? Was anything done to the heads, better springs, a bit of match porting, or? Lots of duration on that cam, way more then you probably need, was it degreed to verify the centerline or just put in and set with the marks? Good headers or some little peanut tube `1 1/2" block huggers?

If I had to guess, I'd say probably the 340-360 horse range.... If work I mentioned was done, plus a lot of other goodies that the engine builders like the guys we have on here (Pat and Jerry) do things, then a cam that would work in sync with the rest of the engine, you'd probably be nudging the 400 horse level.....