Oil/Dist drive gear!

If you want #1 spark plug in the factory spot point the slot towards #1 cylinder. But if you don't care were #1 is on your cap you can put the slot any were you want. For example when I did my first SB Mopar I did not know that when the timing marks on the timing gears are lined up that it was #6 firing not #1 so my distributor was 180 degree out. I didn't bother pulling the distributor I just moved the wires around the cap 180 degrees. That bugged the crap out of a buddy of mine because he is so anal about everything being right. To this day he still askes me if that distributor is still "wrong" in that truck, I normally would have changed it but I have fun now with it because I tease my him about it.

Chuck