fuel line routing

I finally got around to fitting proper fuel filters to my '78 650E. My initial attempts were foiled by the stiffness of the generic 1/2" OD - 1/4" ID fuel hose from the auto parts store. It was too rigid to make the necessary bends and two thick to fit between the carb body and frame. I had...

I know there are many variations on the theme of fuel line routing here but I can’t quite see my set up in the various responses and pix: I guess this thing originally (‘78 Special/Canadian/BS34) was fed fuel via two petcocks. The fuel inlets are outboard on either side. I now have one petcock...