The servos should come with mounting screws and an assortment of arms, I use the 6 arm one on most of my throttle hookups and I cut off the arms I am not using.
The ARF should come with all of the linkages, connectors and clevis' that you will need. Some ARFs come with all plastic clevis', I replace all of them with "Dubro Safety Lock Kwik-Link" they are a plastic clevis but with a metal pin and keeper.I still use the kit supplied plastic clevis on the throttle.
http://www3.towerhobbies.com/cgi-bin...?&I=LXWH32&P=7