Long Range Petrol tank access issue

[dom14]

More then likely you won't be able to do anything about that. With the sender out you can check the operation of the float and arm. You will more then likely find that at full upwards travel of the arm the float is only sitting in about quarter of the tank.

The variable resistor strip is actually dipped in petrol. Apparently petrol doesn't cause the contact of metal tab & resistor any weaker.
But, I reckon it's bound to weaken the contact over time.

Apparently electric sparks is not a concern for having live electricity across petrol?!

I wondered why they haven't designed the electric part of the sender in a sealed compartment without any touch with petrol!
They had no issues doing that with the Oil Pressure Sender.

Are there any markings (spec) on the old pump?

None. I guess I would have to look into the the manuals to find out.
If you come across the specs, pls do post me.