1979 Porsche 911SC Ignition System Upgrade

[@hughchamberlain5018]

The best modification to my ignition was to replace my original (recently rebuilt) CDI box with a CDI+ box from an English manufactorer. I haven't so much as looked at my ignition in 10 K mi. BTW, I'm using NGK BPR 5 ES

[@zonoscopePictures]

What NGKs do to use on these models ? I’m running BP E6 on the recommendation of the shop that worked on the 81 SC before I got it .