I think it is item #65 at
http://www.pelicanparts.com/911/911_Parts/1978-83/1-7-2.JPG
To check for oil leaks, I removed the complete intake unit with the motor in the car.
Described by JWW in
http://www.pelicanparts.com/ultimate/Forum3/HTML/007406.html
On my throttle lever plate, the linkage attached to the ball-shaped heads is worn out.
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Robert / 80 Targa
[This message has been edited by robs (edited 05-10-2001).]