I'm curious as to what cam profile is in there.
Solids do make a racket even properly adjusted but I'd like to point out that the anti-pump-up hydraulic lifters often are as noisy as solids.
Did anyone mention that the clearances are adjusted with the engine off?
Incidentally those appear to be titanium valve spring retainers? Wonder if the valves are also?
Sounds like a nice engine and someone knew what they were doing when they built it.
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