I have a 1999 Early F-450 7.3 that I bought at an auction. At first I couldn't get it started and discovered that all the glow plugs were burnt out. I rebuilt all injectors and replaced all glow plugs. I am still getting a very rough idle and am getting a report of cylinder 1 and 8 fault during the cylinder contribution test along with a lot of white smoke. The truck will now start and the IPR pressure looks good. Is a compression test the next step for me? I have a video showing the blow back out of the oil fill tube. This is happening without any contribution from the turbo as the inner cooler pipes have been disconnected in order to get access to the valve covers. Please let me know if you have any suggestion as to how to get this truck to run properly. The oil fill looks like a train smoke stack puffing white smoke. See attached video.