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Bill,

I should have thrown out more info... I wasn't thinking. The 115 MOP and 110 MOP are on the same pulley.

There's a red dot/ blue dot dual MOP pulley. When the red dots are properly aligned, the blue dots are FOUR teeth down. Sound familiar?

In the same way, when the red dots are properly aligned, the 115 MOP timing marks are THREE teeth down. See teh attached JPEG.

If the IN next to the red dot is facing forward on the Intake pulley, then the EX mark will be facing forward next to the 115 timing mark.

If the EX next to the red dot is facing forward on the Exhaust pulley, then the IN mark will be facing forward next to the 115 timing mark.

To switch from 115 to 110 (or vice versa), it's necessary to remove the pulley, flip it over, then time using the other MOP's timing mark.

Besides, it's been 52 years since the J-H was introduced. Who knows what some interim owner might have installed on the cams.

Later,
Tim