SpeedMaster Heads for a 5.9 Magnum

@MOPAROFFICIAL

Hi, i have read this thread but not quite sure if I understand everything correctly. I want to buy these Speedmaster heads: Mopar Chrysler SB 318 360 170cc 65cc Hydraulic Roller Assembled Cylinder Heads
My cam is Comp cams 20-746-9.

Are these heads p&p for Mag engine with factory rocker arms or Kegger intake manifold or do they need mods/parts to bolt? If so can you list them to me if it's is not a problem for You?
Also can I expect around 300HP to the crank with this setup. I already did Kegger mods.
sorry form my poor English but I'm internal, Poland in Europe.
best regards
WASyL