Which is the number one plug wire on the distributor of a Chevy 350?

The distributor has two screws from the closer to the fire wall of the truck count one pin of your cap to your left hand faicing the engine

NEW ANSWER: It would really help to know the year. Take the distributor cap loose so you can raise it up and see the rotor. Then take the #1 spark plug out. That would be the first plug up front on the drivers side head. Then put your finger over the plug hole while you have someone to bump the key/engine over alittle at a time until you fill air stop trying to push your finger off of the plug hole, as soon as it stopes then pay attention to where the rotor is pointing on the cap. That will be were #1 wire goes on the cap. It is tricky to do.so do it a few times until you get the fill of it. Remove the coil wire before doing this.