I've had a the Walbro for a while too. I did my return line a little different. I ran a rubber fuel hose from my draw straw II to my pump, and used my old hard supply line as my new return from the pump. Its looks really clean. Mine was set at the "16" as well. No issues with it. Just another truck with a walbro. :thumbsup
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'01 2500 2wd QC SB, Goerends w/ billet input, triple disc, Smarty, RV275's, Rips 4" STR8 pipe