My story is - Just bought a 67, F-750, 361, 2 b Holley, farm truck that has been sitting for a couple years. I'm gonna drain bad , crusty gas out. The Holley has a screen at the inlet fitting & there is a screw on filter on top of the fuel pump that is a no brainer to change both. Would I put another "clear, see thru" type filter in line for good luck ? Any other options like a Mercruiser filter or old fashion sediment bowl

 

You might want to try posting in the large truck forum. Everyone here just has baby trucks. Large Truck - Ford Truck Enthusiasts Forums (ford-trucks.com)
I would remove the fuel tank and clean it with some lacquer thinner first. The lacquer thinner is the best and fastest way to dissolve old gummed up gas. The filter on the fuel pump is quite large and really all you need. Adding a lawnmower filter only increases your chance of having a fire. The factory never used rubber line anywhere between the fuel pump and carburetor for a reason.

 

As I recall, some vehicles of that era used a small filter that fits directly into the fuel inlet of the carburetor, just before the fuel enters the carburetor bowl.