NOS cam
I would not be terribly concerned about finding a NOS cam. You can have an exact duplicate ground by several cam companies or have a modern take on the original that will be make more power. Once in the engine nobody will see it or know it wasn’t an NOS cam unless it is a totally different spec which would sound way different. It all depends on your goals for the project. Good luck.
I put a hydraulic roller in mine with specs similar to the RAIV cam but a modern updated style with a little more lift to optimize power.
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