Does your fuel gauge wok properly?

Does your car act up when the fuel level is low?

Our '88 745 has a problem that caused issues when the fuel level went below 1/4 of a tank. This is common in 740s, and has to do with the pickup

In any event, it would be prudent to use most of the fuel before you began your work.

Read the FAQ, much of it might apply.

I vote rotted sender. Have dealt with that issue before. Easy enough to inspect and identify, harder to change depending how rusty. Last one I did, the lock ring had to be cut off. Less than desireable when dealing with fuel. That'ste NY rust for you!

As Art sez.

Odds are the leak is from a deteriorated return hose that attaches to the Sender Unit (remove the inspection plate under the rear floor and the back of the wagon)
The hose drops down the front of the tank and meets the return line.

That or another hose, or the top of the Sender Unit is leaking from rust.

Tanks almost NEVER leak.

If indeed you need a tank I feel your pain. Scuttlebutt is the aftermarket tanks are not liked.

There are other reasons your fuel could be dripping from the top of the tank. Have you looked through the inspection cover?
--
Art Benstein near Baltimore

A grenade thrown into a kitchen in France would result in Linoleum Blownapart.