This is why you need to speak to an engine builder and they/you need to discuss options with the actual parts manufacturer.
Certain camshaft producers recommend different valves, springs and retainers for various reasons.
This has bitten me on the ass before - my previous engine builder just threw in X valves with Y camshafts hoping to get Z results, but the parts are only compatible to a certain extent and I damn near smashed my valves and ruined the build.
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