you have to take the fuel lines off the injectors and the pump, fuel return line needs to come off, and the injector nut. should be a 3/4 in wrench for the fuel lines, a 10 mm for the fuel return, and a deep 15/16 or 7/8 for the injector nut ( can't remember).

 

Yea, like my fellow 9412Valve said, make sure you replace all the washers, even if they look good. Don't forget the ones on the return lines either! I had a bit of trouble with #4 and #6, but I did exactly what Hammer suggested, and it worked like a charm. As far as bleeding the lines, I always do - guess its just habit? Anyway, I don't worry with priming up the pump. Just finger tight the injector lines and crank it a bit til it's leaking out of each line (on the injector side) then just tighten each one up til you get em all.
As far as stuff you need to take off.. I usually take that fancy valve cover off and remove the injector lines completely so I've got the room to work. I've done it to my truck quite a few times. It's a pretty straightforward job n shouldn't take all that long. good luck

 

are there like a rubber oring? ill give it a try tomorow

 

Also make sure you put some high temp anti-seize on the body of the injector when you install them as it will help when you need to remove them again.