Wanting 500 hp (or close) out of a stock stroke 360

no. if you had 11.5-12.5:1 compression. its plausable then. cam has lots to do with it and that is a pretty mild cam for 500hp 360" mild compression motor. id say probably 400-425 at most
my very well flowing gen3 hemi will make around 600-650 but my compression is higher than yours as are the head flow numbers and smaller cubes. with a larger lift turbo cam.

id be more concerned with overall power across the range of the rpms. that will be faster than peak numbers all day on a street racing getup.