[Dominik]

Frankly,

I have no opinion here. There is so much hocus-pocus going on with spark and ignition (yellow wires alone give a 30 hp gain ...) that I advise to talk to the pros who build that stuff.

i.e. MSD.

I know that a HEI ignition as found on every Chevy, fires through a wider gap, as does a HKZ from Porsche.

My buddy uses the HKZ for his race cars (Chevys) since ages, long before MSD was available in Germany.

Dominik