[Big Kev-O]

I too modified my fuel sending unit by upsizing the return to 3/8" and using the existing 5/16" as a return.

I attempted to braze in the stainless 3/8" with solder but ended up using silvaloy (courtesy of work). Solder wouldn't stick to the sender. Took the sock filter off the 5/16 and reamed it out for the 3/8" feed.

The FiTech inline pump has a humming noise which you can notice when the truck is idling but it's not too bad. My truck came with 50 series delta flowmasters and the just about cover the sound. I wouldn't use the inline pump unless you have performance exhaust to cover the sound. I'm cool with it.