Speedo in op on 4 speed OD trans.

You must be misunderstanding how those work, or are mis-counting the gear teeth. there is not "one of two positions marked." There is only one position that covers the RANGE of gear teeth that you have installed.

Here:

http://www.forabodiesonly.com/mopar/showthread.php?t=143956&highlight=speedo

http://www.forabodiesonly.com/mopar/showthread.php?t=137442&highlight=speedometer


I believe where the arrow in the diagram points to "6' clock" there is a bump to act as a pointer. Note in the diagram it says, 32-38. This means that if you have a 32, 36, or 38 tooth gear, you point the plug in that manner.




http://www.yearone.com/pco/1_0210/full.asp?page=395