Ref fitting a 123 Distributor: for my Magnetti Marelli, I had to get this from Huib in Netherlands, as the UK distributor [no pun intended] only had Fulvia type drive cog, not the two-toothed dog my 1970 Flavia 2000 coupe needed. Huib said it is important to get the right coil, 1.5 amp. He can supply these also [red coil], I got a Viper dry-core which seems to be fine. I think it is important to get either ballasted or non-ballasted coil, but I can't recall which [sorry!]. I've no problem with plug-eating, but then I did invest in those high-end iridium, pointed-end plugs. After around 5,000 miles, the engine continues to pull very well, with no hesitation throughout the rev range, and feels to be happily delivering the full 115 bhp [carb model]. The 123 dizzie is not cheap, but I'm delighted with it.
Mark I