With the 2316's being $400 a set now, it would be better to get a set of Diamonds if they are still around $550 and not have to do all the extra machining. And the need for custom push rods, (thought its probably better to use them anyway).

I did see a set of 40-over 2316's on ebay for $325 right now.

I'm curious on the heads. What are the typical legal tricks that could cost you so much? I'd think the only things that would be legal would be a disired CC, backcutting the valves, maybe a radius edge and a 5 angle valve job. Seems anything beyond that would be questionable on "pure stock". But I'm not expert engine builder so i'd think there could be some more little tricks.