Ignition upgrade to full coil system

I'm curious to know if anyone has done an ignition upgrade to a modern, full-coil programmable system, perhaps from a Mopar engine of similar capacity as a slant-6 ?

The engine of my car is highly modified and I still get pre-ignition (detonation, pinking) even with 100 octane (Shell V-Power, even 102 from Aral when I'm in Germany).

All suggestions and advice would be highly welcomed.