What year 360?

For 500 (N/A) w/street manners you will need to find a big block.

Stock stroke probably but not if you stroke it. I've seen some pretty docile 500 hp strokers. Also street manners are in the eye of the beholder. I personally don't like a super radical engine in my street rides but know some guys that love it.

BTW Cuda67 if you haven't ever built a high horsepower engine you should probably get some professional help doing it. Preferably a Mopar guy too. 500 hp is alot of power. If you don't do it right you'll be sweeping it up off the road the first time you nail it.