5.3L to 383 stroker

[BR3W CITY]

Depending on what kind of cam it ends up with, your dynamic compression will change a bit. The milling will decrease it a bit, but depending how much the chambers are worked, you might gain volume there. I'm assuming this is supposed to stay a pump gas truck?

Do you have any #'s on the heads (or who's heads they are)? What about a rough idea of cam? Between that and how high you plan on spinning, the #'s could be all over the place. I don't think in the neighborhood of 550 would be out of the question provided your willing to spin it a little.