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Don't know if it would be worth it to you, but when I had my engine done and before I took it into the shop (all disassembled & with the new parts), I had a bunch of coatings done to hopefully help out with longevity. I had the bearings, piston skirts, oil pump, cam, wrist pins, and some other things dry film lubricant coated. The guy who did the machine work and assembly (been doing it for more than 50 years) commented on how slippery the coated parts were. I also had the valve faces, combustion chambers, and exhaust ports thermal barrier coated. It was some time ago, but it wasn't too expensive. Hope I live long enough to find out if it paid off.
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Marv Evans
'69 911E
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