I am not familiar with a 6.5, but I think they have Roosa Master/Stanadyne injection system. There should be a primer pump at the injection pump. Pump it until you get fuel into the injection pump. Then crack the injector lines at each cylinder and crank it over a few times, let the starter cool, and then crank until fuel starts spurting at the injectors. As they start spurting, tighten the lines. It should start now. If it runs rough, crack the lines at the injectors one at a time to purge the remaining air.
