87 300sdl - Does not Start after cleaning Fuel filters

[jia300d]

Hello, I just did a thorough cleanup of the fuel system tp my 87 300sdl and now it does not want to start. I emptied the tank to clean the fuel screen. The Main fuel filter is new and it is full of diesel. I hooked up a transfer pump to the engine side of the pre-filter and siphoned diesel from the tank until it was full. I added diesel into the rubber hose that connects the pre-filter to the engine. All this and it still does not want to start. I had put about 4 gallons in the tank and I was thinking I might need more to increase the pressure. BTW, Glow plugs are good.
Can anyone give me some tips or point to a thread that discusses how to purge fuel lines to get this engine running? All help is very much appreciated as always.