Dont be a bit afraid of installing them yourself. With a good air compressor and air ratchet, when I worked on these trucks every day, I could have an injector, or the whole bank done, from start to finish in under an hour, since I went to working on big trucks daily, im a lot slower on powerstrokes now. Some good advice and tool list : 12mm ratchet wrench, stubby and regular, for the rear valve cover bolt on each side, and on the pass side, the lower back 2 vc bolts.10 and 12mm allen sockets, and a 1/2" ratchet, for the stand pipes and dummy plugs, depending on how old they are, they can be any of the 3, a 1/2" square, a 10, or a 12mm allen, and obviously this is the time to update them if you havent. T40 torx, 3/8 drive, short and long, and various extensions for the injectors. You will need various metric sockets, I prefer medium deep, 8,10, 12, and will need deep 11mm for cac pipe clamps. As for the oil rail on the pass side, I use a small, 1/4" drive hex head ratchet, basically a bit driver but is a ratchet, and the bolts take a t30 bit, on the rest of the oil rail bolts, just use a regular t30 and extensions. Flathead screwdriver to push in the injector clips on top of the rocker box, and I usually tap on the injector pigtail connector to push it the rest of the way through the rocker box. Its pretty much self explanitory from there on. In a nutshell, those are the tools and advice you need. Hopefully I didnt forget much