In my 250S I have been running this combination:

• Pertronix kit
• Plug wires with metal beru ends (if you tell rusty 1968 280S, you end up with the correct set with the 90 degree end for the #1 cylinder)
• Bosch copper plugs
• Bosch "Red" coil
• standard bosch cap and rotor.

Modifications made were very minor. A bit of the Pertronix adapter plate in the distributor was ground to fit correctly, and you need to sand off some of the material from the bottom of the rotor so it sits low enough on the shaft not to interfere with the cap. I also bypassed the ballast resistor that was necessary with the original coil and points.

My setup has been running for 2 years and 18k miles now without any issue at all. The engine holds a steady ~600rpm idle and runs to 6300 redline without a miss. I think the setup is pretty much what Randy recommends when using Pertronix.

Jaime Kopchinski
'81 380SE euro
'67 250S