I have a CNC ported set of 302 casting 318 heads done by Jeff of modern cylinder head with 1.88 1.60 valves that would be as good as it gets for a 273 head. They are a full SS deal with bronze guides and all never run. If you decide to go 273 PM me about em, Ill make you a great deal.

I am not causing global warming, I am just trying to hold off a impending Ice Age!