Wally,
I put them at the carburetor inlet. The 1954 truck installation instructions place it in that position. Search on "fuel filter" and "gas filter" in this forum; there are a few long discussions on the variety of places people have installed a bowl-type and an "in-line type" fuel filter.
One thread is here: http://www.stovebolt.com/bboard/cgi-bin//ultimatebb.cgi?ubb=get_topic;f=2;t=002876#000007
Here are a couple pictures:
1954 235 with dual action fuel pump 1960 261 with stock fuel pump in a \'54 pickup Tim
