Here is what I know there was something in that hole and I remember it. However, I have no clue where it is.
This time I decided to remove the Wiring that was in the way to make it easier to try to figure out what the heck the adapter is.
When the car came apart there was a plug in the back of the block. So, I decided to spent some more time looking through
all of the parts that where in the attic and in the trunk of the car and I finally found it !!!
Of course I put it in and it works.
In the end it is a -4 ORB fitting that Kenny modified to close up the hole.
(( 06-13-23 ))
I headed over to High Speed Welding to have him make the fitting I needed which is a -4 to 1/8 NPT
I also removed the tape that Andrew AKA Dr EFI put on the Injector Harness.