Budget cylinder heads for a 318
Indy does bowl work for $150 a head add $150 a head into a good 3 angle valve job from them. Or just get magnum heads and a good valve job. IMHO those are the best options for a 318. For a budget head. You would have to go with a step top piston with 360 heads. And that's fine other than adding rotating mass. Or get the edelbrock magnum heads. But with 2.02 valves in less than a 4" bore valve shrouding becomes a issue and it gets to a point of diminishing returns.
I think we should start a group build gather up donations and heads and send to holdner to do the dyno with same engine and cam just different heads.