My post chili-dog lotto dreams usually involve replacing my 3.0 with a mildly massaged 3.3 Turbo from an 930, followed by rebuilding my 3.0 in a completely impractical manner and making a long-hood hot-rod, something like
Randy Jones's Iris although probably not as refined.
If you rebuild to "S" specs (without MFI), you won't be able to keep CIS. CIS is limited to fairly mild cams. It seems a lot of folks like the "E" better as a daily driver, less total power, but what you do have comes on at a lower RPM.
Nice dreams though.
Tom