Just did 2 injectors ran2 days now skipping

[earnies2]

In the Grove crane ware i used to work developed an injector knock i couldn't determine witch cylinder it was 1 or 2 so i replaced the front 2 I ran the overhead (thanks Rawze) and it ran great for 2 days then started skipping.....i got it back to the shop and had the local shop come down and put a computer on it it showed a bad EGR valve and 2 dead cylinders #4 and #6 thank god it wasent #1 or#2... so i am now back into the engine to replace the 4 i didn't replace in the beginning along with a EGR valve and a rocker box gasket I have never done Injectors before and i am in uncharted waters...so far so good its all apart...now to clean everything up and install new parts i also got an injection harness to can anyone tell me the necessary torque specs and any tips to assembly i would appreciate it thanks