I'm hoping that someone can help out with these questions. I am not sure if some of the answers will be vehicle specific, but I have a 1992 G20 van with a 6.2 (short injectors):

Is it necessary to remove the fuel line from both the injector as well as the pump in order to remove an injector?

What is the fuel line fitting size on the injector side?

What is the fuel line fitting size on the pump side?

Is there a preferred tool to use for properly torqueing the fuel line fittings?

Is it a "must" to replace the intake manifold gaskets if the manifold is removed?

Any tips/advice for replacing injectors?

Thanks in advance!