kill the coil by grounding it. Basically you have a switch that will ground the "-"ve points side of the coil. This is also the tacho wire if you have one (makes life easier).
Basically then it's like have the points closed the whole time, and never opening. It is the best way because if the switch fails it doesn't matter.
If you cut the ignition, you will need a high amp switch, and when it gets old it will give mysterious ignition cuts etc.
Wes -
www.offroadvw.net - 200HP Quad Cam V6 in a VW Baja - with climate control...
🙂
www.taylorcycles.com.au - My DH MTB racing brothers shop.