Stock 360 crank is good to what HP?

I know there are alot of variables but theoretically what can a stock 360 crank hold HP wise? I was trying to build a 360 on paper and was trying to decide if I needed to buy another crank. DON'T WANT TO GO STROKER. I was originally thinking I wanted to build a stroker with 500+ hp but my truck came with 250 from the factory and I was thinking anything over 400 would probably do me good enough for daily driving/weekend racer.