I recently picked up a set of the CNC'd Stealth heads for the Roadrunner. One thing that hasn't been mentioned that was a big plus for me was the fact that the Stealths looke very original once painted. I'm going for a 70's correct hotrod look and don't recall ever seeing any of the cars with big slab sided aluminum heads back then. If you're going for the modern racecar no matter, but if you want something that could pass for stock, Stealths all the way. Still trying to make a final decision between stroking the original 383 or going the route of a 440 sixpack motor, either way I have my heads for the build.
Later, jim