Spark plugs were all good in terms of color and the story that tells. As noted elsewhere in this thread, I think CIS is good stuff, ditto the Bosch CDI. Yes, old, but gimme K-jet over L-jet or even early Motronic any day of (most) weeks for superior throttle response and overall performance. Pretty engine bay? No, it looks like a mad professor’s lab but … it works so well. The same was true with early 80’s VW’s and Audi’s (with CIS), especially compared to the last-gasp of carburetors as found on US and even Japanese cars of the time. Of course US engines then were full-on malaise era boat anchors.
John
