universal ignition switch

I use 1 wire Bosch alternators, they have a start delay that seems to work fine in my limited 30 year experience with three cars.

The start trigger is via the supply for the loss of charging indicator bulb. If for some reason the delay is not enough, a time delay relay could be used. The same delay relay might also be used to lock out the acc supply for radio and entertainment system. Many cars have delay for that.