360hp guesses

PRH said

I don’t remember what the part number was.
I may have posted it in one of the prior Speedmaster threads.

They were assembled heads with a dual spring for a hyd cam and 10* retainers and locks.

Just because the two I had were good doesn’t mean any other ones are.
IMO they should always be checked out before being put on.

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I agree I don't think I would literally peel them out of the box and slapped them on without pulling things apart and making sure everything works correctly. I guess my question would have been more towards the other end of my questions LOL is there anything to be gained besides weight savings or would there be like in your case losses?