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RJ;
Once again, JohnMc has it well covered and I agree with his posting...the bottom line is that the spark has to arrive at the correct plug at the right time, and this is where all the variations between cam/valve timing, dist drive gear, ign wire position can confuse you...don't let them!
...even if the dist drive gear is installed wrong, you can get an engine running...just shift the location of the ignition wires by one 90Deg station in the direction you need, which will allow the vacuum unit to clear the block etc. This trick is to understand what each change you make is doing to "the bottom line." I'll repeat: The bottom line is that the spark has to arrive at the correct plug at the right time...recheck your timing (including cam and valve), firing order is 1342, Dist rotation is CCW.
Good Hunting
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