It begins again - 512 Stroker

How about posting the rest of your build information? For the money invested in old iron heads, any aluminum head would be worthwhile for the added detonation resistance, even a set of the 440 source stealth heads. I know someone with a set of stealth heads on a 512 inch 400 based engine. Even though they are less than optimum, they work better for cruising than the set of worked 906s that they replaced.