You can leave the injector lines on 3, 5 and 6. This can also keep you from dealing with the rear lifting bracket as well. Take cylinders 1, 2 and 4 off the pump and the injectors, loosen 3, 5 and 6 from the pump and push them toward the block gently. That will clear enough room to get the pump out. All you need to do is loosen their hold downs for these lines to give you some play. Also find a small mirror to verify that the key way one the pump shaft is at the 12 o'clock position before you slide the pump back.