83 power ram 50 2.3L Diesel THIS CANT BE RIGHT

hi, I just bought a 1983 power ram 50 but I don't think this is right how it runs. it goes away when it warms up this is just in the beginning. To me, it looks like a timing issue or a bad ring or injector. Any help is appreciated. I see other videos and they are running smooth. he told me he just set valve lash and new glow plugs and something about a balancer shaft??? Hopefully, the videos work and you can see what I'm dealing with thanks