With 500 cubes you don't need alot of compression for the street, but the engine will want alot of airflow and cam.
I have gathered up almost all the parts I need to build my 440 into a 505" stroker.
I'm using the 440 source 4.25" stroker kit with 7.1" rods and 17cc dished pistons (0.030" over), with the older 84cc Stealth heads. That should give me 9.93:1 compression. I haven't ordered a cam yet, but I'm leaning towards the Comp hydraulic Roller cam XR286HR10. The cam is 236/242 duration@0.050, 0.544"/0.541" valve lift with 1.5:1 rocker arms, 110 lsa, 106 cl. I'm using 1.7:1 rockers, so the valve lift should be 0.617"/0.613".