Noob needs help with fuel line routing

Hey guys,

I've got a 1990 C1500 with the 305 and am trying to replace the fuel lines. Like the noob I am (see other post about auto trans cooling lines) I didn't note the line routing before I ripped them out. So I am left with some lines sprouting from the engine, and three lines from the fuel sending unit (4 if you count the vent tube). can anyone tell me what the the three lines on the sending unit go to and where their mates can be found on the engine?

Much appreciated,

alex