Thanks to those who told me what size the fuel line should be in my '38 1/2 ton. This is a great forum!

Next question: What are the "proper" fittings for a 5/16 fuel line ? The outside diameter of the threads going into the carb (Carter W1) seem to be about 7/16 inch, and the fittings currently on the truck are of the compression variety - ie with a ferrule that slides over the tube. I talked to the folks at In Line Tube, and the only fittings they are aware of for 5/16 line have 1/2 inch threads, and they thought that the fuel line probably had flare fittings.

Any hints or ideas about what should be here ?

Also, where was the fuel filter located on this truck ?

Thanks again !

Alex Meade