Someone has been in my CAMS?

How does on visually determine an NA cam from a Turbo cam? No real part numbers on them. Here is the reason I ask. The cam gears have written on them (painted) AND inscribed with both "E" and "I" which tells me someone was doing something.

Then I'm looking at the grind and it looks pretty aggressive and I have painted bands on the cams. Any ideas?

Also - just for giggles, I slapped the S60R Ex. manifold on to see what is looks like. This is much better than the stock one, but wait until it gets all ported and polished!

Scott C.