Here is a little tool i made from an old rocker arm. it works really good, you can adjust what angle you pull from by using a ratchet in the socket and you can get your ratchet out of the way by using an extension when you are in the hard to reach place under the a/c. the shaft is just 13/16 TGP solid stock but you could use 3/4" anything or even cut up an old rocker shaft. when we do them we only hand tighten down the bolt that holds the shaft and go at it. really easy way to do it.
hope this helps
hope this helps