Is that the sen'or master tech all over u tube? I studied his 6.4 cab off before I did mine. he's good, but you'd be too if that's all you did- and lots of 'em!
I watched a Ford senior master tech replace all eight 6.0 injectors in 1 hour 17 min start to finish. Truly remarkable, he claimed it to be the 433rd set he had changed....keeps track of all his work in a journal.