Pulling Fuel Rails - How Do I?
How do they come off and go back on?
Is theer a guide someplace?
http://www.ls1howto.com/index.php?article=18
From there, I suggest removing the fasteners that hold the rail to the intake, then remove the black clips that hold the top of the injectors to the rail. Carefully pull the rail off each injector, leaving the injectors in the intake. With the injectors in place you will minimize debris getting into your injector bungholes
. 

