carb fuel filter ?

[Daves72'GMC]

I have a couple of ?'s about the fuel filter that goes from the fuel pump to the carb?Where should this filter be located above the valve cover or above the fuel pump in front of the engine? I bought my filter from summit and it screws together and I discovered it was leaking yesterday and I tried to tighten it up and it still leaks, any suggestions on how to fix or should I use a different kind of filter? What is the best kind of fuel filter to use, a sealed one that doesn't screw together? Thank you. Dave