Just flush tank, change fuel filter (maybe every tank just to be safe, they're cheap enough), change pump, and use proper submersible fuel hose.
Also that shop, or whoever did it - should be shot.
Get a Walbro 450.. they're good pumps, quiet, work well, flow well.. if used in a very basic/stock application the OEM wiring is ok... start to up the boost make sure you run a proper 60amp relay fed directly the battery through a 25amp fuse.
+ make sure you install a dose pipe, and tune it.. more bends & more length more dose
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sorry I let you guys down, I've repented and edited the post.. forgive me SAU