So today, I did indeed get into the fuel tank.
Dropped it out, and started dealing with the fuel pump upgrade.
Dirty tank:
The pump hanger with the Walbro pump I installed about 8 yrs ago:
Inside looks pretty good to me:
Since I read that the Aeromotive Stealth pumps don't like to work through small, old wiring, I wanted to do a full wiring upgrade.
With that in mind, I drilled out the rivet connections holding the factory wiring in place at the in-tank ground, in-tank power, and external ground and power connections.
The oem power line through the cap is a neat arrangement of two discs of what I believe are porcelain or ceramic material, with an o-ring between them to keep it airtight, with a brass terminal on the inside:
After drilling it out, I found that a #8 fastener would fit through the original hole, so I bought some stainless pieces.
Also, after reading a bit about I.J. suggesting teflon-coated wire for in the tank(as well as seeing that the Aeromotive wire was also Tefzal), I decided to use it. Problem was, the stuff that came on the Aeromotive plug wasn't very big, and I didn't see the point of using 10 gauge wire outside the tank, if it was going to have to narrow down to ~16 gauge inside the tank. The other problem was finding some. Then I realized- this is aircraft-rated wire. I work with aircraft mechanics. So, I just rolled up to work, and took my pick of the wire I wanted, since they had every gauge conceivable. I just had to de-pin the spade connectors from the plug, and re-crimp the larger wire in. Problem solved.
Aeromotive wire vs. my new wire:
Then I drilled out the original groundpoint rivet hole, and used an m6 fastener:
The ground outside the tank on the top of the cap is now also m6.
I've already tested all the connections, and made sure that there's absolutely no continuity of the power terminal to ground.
Next, I just have to finish up a bit more of the external wiring to the new relay, and the fuel mod is done. It'll be a little while till I can reinstall the tank, however; I've found that I have rust holes through the spare tire well floor in three different places, so I'll have to do some cutting and welding first.