Front cylinder on the drivers side.
if you stand in front of your truck, on the right hand side, closes to fan, remove your first spark plug, that's the #1 cylinder.AnswerThe above answer is incorrect unless you have a Chevrolet 400. The Ford 400 V8 number one cylinder is located passenger side, front of engine, not drivers side.
That would be a 1978
The carbuerator advances the distributer.
18436572....and the front cylinder on the driver side is #1. Driver side 1357 PS 2468
how to set the timing on 1978 f100 ford 400 engine
Driver side front cylinder...... Driver side 1-3-5-7 Passenger side 2-4-6-8
whichever front cylinder is farther forward, like closer to the radiator is number one # 1 is on the drivers side front cylinder, firing order is 18436572, distributor has counter clockwise rotation.
Driver's side below number 5 and 7 next to exhaust pipe
a 400 small block Chevy has a 4.125" bore.
400
400 is a significant number because it is a square number as 20*20 = 400