I would like to know

why. I know several guys that put la heads on their magnum engines. They do that to get a better choice of intake manifolds. But why do they also put magnum heads on an la engine? I guess that I don't understand why. If your magnum heads are cracked between the valve seats, new not cracked magnum heads are close, if not more, than aluminum la heads when they are on sale. Help me understand this. TIA.