I know some people recently have fitted a relay to the ignition circuit for seemingly two reasons. One being to boost the voltage voltage to coil especially when cranking (along with taking out the resistance wire) and the other to save some strain on the ignition switch.
I had a look through this with my dad a couple of months ago and neither of us could see how it would boost the voltage (other than replacing the resistance wire) or save the ignition switch, due to the way it is wired through the bulkhead connector and solenoid.
If someone could explain in detail how the addition of the relay in this situation gives an advantage, and specifically where in the circuit to add this relay, I'd be very grateful.
I'm doing the final mock up of the wiring today before it all comes out to be taken apart, modified and stuck back together.