Which HEADS

blk00rt said

the magnum heads are prone to cracking and I have known several guys that have had cracked heads on stock 5.9 engines. They do flow better than the la heads. You might want to look at EQ magnum heads though they seem to be a good stock replacement and flow decent.

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Yup. Dont waste time or money trying to find good used magnums. I have a good used set,but I got really lucky.

The magnums are a little more expensive route to go,as there are extra costs involved putting them on an la block.

Im a firm believer that they have a better exhaust port and modern combustion chamber. It allows for more compression,less timing advance and cheaper fuel. Worth it IMHO.