Camel hump heads, good price?

[drman929]

I know a guy with a set of reconditioned camel humps. He said they have big valves in them and are ported and polished. Complete heads, assembled. Never ran since the machine work. They've sat for 3 years since the machine work. He said he would sell them to me for $400. How much of a gain are these heads over a factory 72 head?