Dropped the tank today. Found some pretty nasty stuff. The seal had definitely slipped out of place. The strainer was so clogged it basically imploded under the force of the pump. There's less than 4000 miles on this pump and strainer.
The gas in the tank looks awful cloudy!
The entire inner surface of the tank is covered in rust.
I'm replacing everything. New fuel filler neck, tank, sending unit, AEM pump, all hoses. I'll also flush out the fuel lines and maybe pull the fuel rails as well. Maybe bench-test the injectors to see if they're clogged up too.
And then to make fuel jobs easier in the future, I'm considering cutting an access panel behind the rear seat. I picked up the cover plate from another w-body at the junkyard years ago, it looks like a pretty good fit. Obviously the picture is just to check the size, that panel itself will be screwed in from inside!
Has anybody done that before? Is it a terrible idea? I don't know how I'll even cut it. I have a drill to get started, but don't really have any kind of cutting tools for metal.