I bought a 74 Scout that was converted from a 258 to a Nissan diesel, nonturbo. Unable to speak with the previous owner who did the conversion. His family stored it in a Minnesota shed since 2002, never drove it. So the brakes are all renewed, ready to begin check list to start it. Question..there is a fuel line from tank to 7" screw on filter. From 7" filter to manual primer pump, to smaller canister, then to injector pump. Does that sound correct? Next question, since the fuel is from 2002, or earlier, what's the best way to clean out tank? Gauge shows half full. Any other info will be helpful. This is my first diesel. Thanks.