PI head advice, knowledge!

[2v_takeover]

Someone's selling some PI heads right now on Corral.net, but they have slight pitting as you can see in the pictures. I'm just wondering if I were to buy there and get 'em plained, if all the pitting doesn't come out what problems would arise? Awesome price and I'd have no problem getting them cleaned up n such.

http://forums.corral.net/forums/modular-engine-parts/1338383-4-6-2v-pi-heads-other-parts.html

Thanks.