um i think you have a later model pump,with the idle speed boost,,like an a2,,,has the "detents" in the cold start cable for advance,and idle boost,,thats that linkage on yours,,,,,,itll work fine,,butits missing a linkage rod that extends from that upper piece circled,see the bent tab? thats where it hooks there,,down low,,,,,ican see the link in the pic,,its sorta laying on the valve cover,,,,,,that hooks up on the top bent piece i described,,,,,,that piece adjusts the idle speed,it had like a 6mm hex on top,,,,,,,, its broken,the link,,,iwould think it woulsd mess up the idle,inless you can rig it to stay or somethin,,someone will have an idea,and post,,,,,,,,,,