If it was me...
I'd remove the access hole plate under the back seat.
Pull the sending unit.
Replace the pickup "sock" on sender.
Blow out the hard lines with compressed air.
Replace the two short sections of fuel hose and button it back up.
While sender is out you can inspect the tank to see if there is gunk in bottom.
You can also use larger hole to siphon most of fuel out if still dropping tank.
A spoon with bent handle secured to a dowel or rod can be used to scrape the bottom of tank to check for gunk.
Dropping tank is pretty easy on these as the poly tank is secured to big skid plate/coffin setup bolted to frame & body.
If fasteners are crusty spray them with something like PB blaster a few days before dropping it.
Last edited by babywag : 09-18-2019 at 07:44 AM.