Horsepower limit for out of the box Edelbrock RPM heads

there are pics on this listing as well...i wouldn't buy them from these guys though as they seems to be priced pretty high. the pics in the listing are ok though.
i think i see cnc marks on the short side radius on the SB heads..

Small Block.
ProMaxx SB Mopar 318 340 360 183cc CNC Ported Cylinder Heads | eBay

big block
ProMaxx BB Mopar 383 400 440 237cc CNC Ported Cylinder Heads | eBay