Which cylinder is number one on a 350 engine block?

Facing the engine from the front, it's the first one on your right, the firing order is 1-8-4-3-6-5-7-2.

(clockwise rotation) Standing in front of the car facing the motor, number one is the front plug on the right (drivers side). You will also find the cylinder number stamped on the intake manifold near each cylinder and the firing order will be stamped in the front center of the intake manifold.