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Re the cams, I once checked out the published specs and found what amounted to only an insignificant difference in terms of lift or duration. No idea of what (if any) differences there might have been in the actual profile, but I suspect that if this was of any meaningful benefit lots of guys would be jumping on the cam-swap as a hot deal.
Re the teardown, I was in exactly the same boat a couple of years ago, and started out by shooting a whole bunch of photos from even angle so I would have some reference to look back at if I had doubts. Also took a bunch of shots during the disassembly. Memories aren't as good as pictures.
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