Standing in the front of the engine it will be the first spark plug in the left head up front.
Passenger side, first cylinder up front is number one.
On a FORD V8 engine : 4 - 8 3 - 7 2 - 6 1 - 5 front
Passenger side (Bank1), front of engine, 1st cylinder
First cylinder up front on the passenger side.
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front ( Ford V8 engine ) also , for the straight 6 cylinder engine , the # 1 cylinder is at the front
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Ford ( V8 )
The #1 cylinder is the one closest to the front of the vehicle. ( on the passenger side of the engine )
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Ford / Mercury ( V8 )
On a Ford 460 cubic inch ( 7.5 liter ) V8 engine : firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle
Ford V8 engine : firewall 4 - 8 3 - 7 2 - 6 1 - 5 front
Ford V8 engine : firewall 4 - 8 3 - 7 2 - 6 1 - 5 front
On a Ford 302 V8 engine : firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle