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If it was my car, I'd put a good valve spring on it and get the jetting spread under control. I'd put a set of beehives on it, set to ~.060-.080 of coil bind and see what it does.

The rockers were likely giving you problems because they were getting the snot kicked out of them because your valve springs were weak.

The cam in the engine is OK and you don't need a tear down to do the valve springs.