first cylinder on your right looking at the engine
# 1 cylinder is the front cylinder on a Ford straight 6 cylinder engine
1st cylinder up front on the drivers side is #1.
The front one.
Assuming this is a V-8, Chevrolet's #1 cylinder would be the first one in front on the drivers side bank.
3/16" and 1/4".
The number one cylinder on any 4 & 5 cylinder is the cylinder at the front of the engine. On a GM V6 & V8 it is the front cylinder on the driver's side.
Could be the wires are reversed?
307 is a prime. It is divisible only by 1 and 307.
The positive integer factors of 307 are: 1, 307
1 and 307
1-5-3-6-2-4
the number 1 cylinder is on the left side (drivers side) all the way up front. (closest to the water pump/fan)