Whats the deal with 340s?

273 said
I don't really see magnum as a different engine sure there is differences but it's basically just the heads and most that build LA are throwing aftermarket magnum heads on anyways. Only down side of LA heads it's more work to build quench.

And the roller valve train, And the increase in compression, Much better tolerances from the factory. And the magnum heads are not bad factory heads.