What is the prefered circuit for the key on signal B+ connection for the MSD box
It's a new M+H Wiring stock underhood wiring harness in a 1970 Road Runner
MSD box is going to be under the battery tray and I plan to use the radiator support for the primary ground and the B+ post on the starter relay for battery positive. And will be routed along the factory fenderwell and firewall wiring but not wrapped into it.
My initial thoughts are the J3 circut off the ignition switch coming thru the firewall bulkhead connector - using the original feed wire for the stock coil ( stock ballast will be there but non-functional)
