Feedback Return (?)

I have a 85 F-150 302 two wheel drive with a motorcraft carburetor. On the back of the caburetor is Feedback Return motor (?). That is what the FORD parts department told me. The problem is FORD no longer makes this part. They stopped this in the late 90's. I have been every where possible in the area I'm in and nobody knows what it is or can even find it in there books or computer.
This "gadget is 2 and 3/4 inches long. Has a triangle end that attaches to the carburetor with three screws. On the other end is a two prong unit that receives a connector with two wires.
The part no. on this gizmo is 247 E3TE.AA 4L01.
Ignorance is not always bliss.
Thanks
coldsaber