Hi, I have a 1986 MCSS and I cant seem to remember what a certain engine port is for. It’s located on the drivers side kind of mid block. I know there is the temp sending unit towards the front of the block and the oil pressure sending unit above the oil filter but there is another port with the same threads as the oil pressure unit. It’s nearer the #5 cylinder. What is that one for? I took the motor apart (partially) and didn’t take enough pics to retrace my steps. Thanks for any info. Steve.

here a pic of the port. This one is plugged. Were they all plugged and if so I wonder why I would have removed it. In other words maybe something was in there.
Here is a pic. Just looks plugged off. Were they all plugged off and if so I can’t figure why I would have removed the plug meaning maybe something was in there.???Here is a pic. Just looks plugged off. Were they all plugged off and if so I can’t figure why I would have removed the plug meaning maybe something was in

 

Can't see the photo.

 

 

It's for the clutch pivot ball.