you can spin the engine to tdc by the mark on the engine damper and see where distributor rotor is pointing. that will either be #1 or 180 degrees out, can use that as #1 and crank engine to see what direction rotor turns then set the wires up 1-3-4-2 in direction rotor turns. if that fixes it great, if it backfires or wont start can start #1 directly opposite one you used before and change other wires accordingly