308/208 Ignition Systems

I have a Ferrari 208 GT4 single dizzy based in the UK. What ignition systems are people running on their 308s? I have a slight (only slight) miss at high rpm I'm trying to diagnose.

Here are my specs:

• Single dizzy, points and adjusted professionally
• New Viper 1.5ohm dry coil
• New ballast resistors
• New condensers
• New NGK BP5ES spark plugs
• New HT leads, extenders and rubbers

I've found a dual point electronic hall effect sensor conversion. It's only for sale on the US and is around $400

 

Thanks, do yoy know what spark plug gap you run? Mine is at 0.025