Pull your valve cover off and check when the pin engages the timing hole if your intake and exhaust valve are loose on #1.
I'm not talking about your valve clearances, what I am saying is with the engine pined with the timing pin the valves should be loose on #1 cylinder. This will prove that you are infact on TDC #1 which is where the engine needs to be to time the pump correctly. If these valves are not loose and your valve lash is correct then you have a gear timing issue. Kevin