[ERA Chas]

Don't change you plugs and don't go against Brent's advice to keep idle at 1200 or you'll make lifter problems.
Forget wiring, switches and needless junk.
'Clutch' it off-that is when shutting off key, slowly raise clutch pedal in 1st gear. Let the clutch drag the motor off. Practice for 2 or 3 times and the car won't lurch.
Won't hurt anything.