Best / Cheapest Heads for 5.9 Magnum

If I had realized how cheap EQ heads were I would have put them on my 360 instead of factory replacement Magnum castings; I would have ended up spending only a bit more but with much better performance and peace of mind. They also get my vote for your build, only $310 each bare on competitionproducts.com you can't do much better than that... then port them with 2.02 valves and you will have a serious engine (say 450 HP at least on a 360?) with tons of torque everywhere due to the strong low-lift flow.

FWIW factory Magnum castings are known to be able to support 400 HP with no mods... of course that's with good cam, intake, headers, etc.