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All sorts of advancements. Many things come down to cost. You could machine a head today out of many things that you could not cast or machined 10 years ago. You could do titanium, magnesium, ceramic etc. if needed, with either with additive or subtractive machining today that you could not do cost effectively a short time ago. I think what is possibly with these old, old engines is still yet to be discovered, it just comes down to $$$$. future should be fun as more of these exotic things become more commonly available in general support of these old engines.
john
Last edited by targa72e; 10-12-2023 at 09:10 PM..
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