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Yes, they did.
Their springs have an installed height of 36mm prob +/-0.1mm
The Porsche springs install at 34.2 / 34.5 for both valves.
They are designed to have a slight (finger push) interference fit between them to stop harmonics occurring at speed.
Stock springs have 1.5mm clearance!
My machined heads should be ready in 2 weeks, so will get on with the set-up then.
The pistons and rods are still mid December/ Xmas.
I still cannot find any mains bearings or cam chains
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