[Spridgets] Broken rocker arm

[lotuspilot at frontier.com]

 Hi everyone in Spridget Land,
Yesterday, I had something happen that I have never seen before.  I was driving the Sprite and the engine started to sound like a Subaru WRX and then I decided to limp home.  
I started looking for the reason and found a broken rocker arm.  it is the stamped kind from a 1275.  
Here is my question - How do I replace the rocker arm that is located on cylinder #3?  
Thanks for all of your help in advance.
Mike Carpenter
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