Maybe fits in this section, mods move if needed.

While reading green book, engine section of it, there was mention of different Renix numbers with different engines.

It says that B200K engine without indicator had Renix 414, however with change up indicator it was version 406 or 407 and it did have different timing map too, 24 instead of 20 degrees book mentions at 42r/s, I wonder what else was different? Always thought that it was only a light at dashboard, but seems to be that there is other changes as well.

Maybe it would be possible to put 406 or 407 Renix to car which has 414, because more advance it could be better economy. Or then cars with change up indicator came with different cam?

Had a car with a change up indicator, most annoying thing ever. Was a 1985 high compression 360 GLS (10:1), incredible instant torque, but not much economy despite the high compression and octane that allowed the greater ignition advance. I don't think I kept the ignition module when I scrapped it.