[Bob Ashlock]

Good points you make about the continuous add-ons and improvements to the CIS system. I once owned a '74 911S with CIS and (at that time) I felt it was a great system and a major improvement over carburetors. But of course that recollection is 30 years old now! Anyway, the only way I would attempt this is if I could bolt it on without changing the cams. Knowing now that is necessary, then your point is well-made that there would be so much "while I'm in there" work that the whole thing would be a ridiculous experiment!