Help with Valvesprings and valve float. Noob

yellow rose said

I'm not sure about that. I've run unbushed aluminum rockers with 320 on the seat and over 800 over the nose and shifted at 8500 plus and never had an issue.

If the oil timing to the rockers is correct, they don't need a ton of bearing area. Getting the oil timing to the rockers correct is a whole 'nother issue and discussion.

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Sure, but they were supported the full width of the rocker, right? take the bearing out of the OPs rockers and replace with same width bronze and you get maybe 1/2 to 1/3 the surface area. No way you will maintain an oil film with that small of an area with any kind of spring pressure. If you could, they would be doing that on race engines. Bearing width = friction and friction robs HP.