number one on the distrib. could be any place you want it.
If you pull the distrib. and turn it 1/8 of a turn and change each wire around one hole it will still run the same.
My '51 pickup F-1 is like the "wrong" diagrams show it. If the distributor is 180 degress of just put the wires 180 degress off and you be 360 off ( full cricle).
If you put your fan belt on backwards will the fan blow instead of suck?