Best way to Prep Stock 5.9 Magnum For Boost?

Howdy everyone,

I bought a complete 5.9 Magnum with around 90k miles on it for my '72 Demon after reading up Magnumswap.com.

My plan was initially to build it up into a hot 400 horsepower engine with new heads, cam, carb, headers and intake; basically similar to the 390hp 360 Magnum crate engine Mopar used to sell.

Since then, however, I decided I'm going to install a single turbo to the engine with low to moderate boost to get to around 550 or so horsepower and similar torque.

My question is this: do I need new heads for the engine now that I'm going with the turbo, assuming the heads I got now are good to go and not too cracked? I'll still go with the cam, carb and intake although I assume I'll need an intake that will fit Magnum heads.

Thanks!