So, last fall I had a cousin offer me his 1969 D310G track loader. Hasn't ran since 1986, been inside the whole time. Gave it a once over and it needs a couple cylinder packings, changed the fuel filters and cleaned out the fuel tank, and changed the oil in everything. Dispite a full tank of fuel I had to bleed the filters by pressurizing the fuel tank. I cracked the lines at the injectors, barely and fuel cam out. The leak off line from the injectors to the pump has fuel blowing out of it when cranking. Seeing as this sat for 30 years so I just take the pump. I've been told it might have something stuck causing this? Any help? Tricks?