icanfixall
Official GMM hand model
So you have not opened the side cover to the pump yet to see if the main shaft is broken. Not much more left to tell you to do.. Might try this. On top of the injection pump is the pump return check valve that the fuel shutoff valve opens so the pump can return fuel. Take that completely off the top of the pump. Its easy to remove because under the fitting at the pump is an o ring. Once thats off crank the engine again. See if fuel comes out of the top of the open pump. If it does you still wont know if the main shaft is broken but you will know fuel is getting thru the pump.