Fulcrum pins? Are you talking about the bayonet pins for the shift cup? If they lock the cup down and load the spring, they are OK as is.
The 420 has always had a "loose" feeling. Those parts will tighten up the "throw" distances. You can't change that.
But I don't know if wobbly means rattling while driving or long throw distances or ?
Remember: if it ain't broke don't fix it. You are going to screw something up that causes you to remove the trans if not careful.


Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn