360, LA360, or Magnum 360?

The main advantage in the magnum short block is factory hydraulic roller lifters but the stock cam itself sucks, head wise depends who's flow numbers you go by it seems the magnum have a slight avantage over LA's but ported LA's seem to win, Factory and aftermarket Magnums heads will work on an LA block with the right hardware. 73 360 should have thicker cylinders and J Heads.