349 CI on the cheap

"Because we can???"

BJR - just to pick your brain: What would the implications be, using a set of mildly ported 596 heads on a 349 instead of 302 castings? Would the chambers be too big? Not worth my time?

I ask because I have a set of ported, rebuilt 596s on my current 360. If they are suitable it would save me from building 302s and putting the 1.88/1.60 valve set in them. I have a set of 302s, but they are unbuilt.

I now have a 318 block (stock bore) and a MP 3.55" forged crank with the correct mains. I'm looking for a nice little 450hp mill, nothing crazy.

Again, just poking around...I can't plan to put this motor together until the rest of the car is done.