just looking at this recently and came across my old paperwork from 1965
scanned it and created a pdf.
So this is 3 pages and describes how it works, if anyone is wondering how.
I found these cartridges at filterbarn for $5.37 each.
Is there a cheaper price
H&S Industries - Lodi, WI
they are actually a good filtering setup but the inside of the can tends to rust after E10 exposure!! and mine need recoating.
I tried to post it on cruiser forum but gave me a security
So here it is on docstoc.
shows the fuel
flow plus decription and how to install etc...