Thanks for the replies.
Dan, I am sure Nick could help me. We have corresponded regarding other Cobra issues several times, but I'll try local (Australia) first.
Bob, I don't know what type of sender I want/need at this stage.
Gary, I believe you that there are plenty of resistance boxes / gauge testers out there (I clicked on your link).
I'm new at this but I've read a little bit about how to setup a sender (mechanically) and tweak the calibration of the gauge.
What I don't know is whether there's a particular type of sender that I should be looking at that suits my MGB gauge, or is any sender able to be used, providing it's calibrated correctly?
From
https://www.hotrodhotline.com/instal...r#.W3uS5egzaUl
"Installing A Fuel Gauge and Sender"
"Which Fuel Tank Sender Do You Really Have?
0-30 Ohms (GM Type '64 and earlier)
0-90 Ohms (GM Type '66 and later)
75-10 Ohms (Ford Type '86 and earlier)
16-158 Ohms (Ford Type '87 and later)
90-0 Ohms (Toyota and Nissan '85 and later)
240-33 Ohms (Standard Aftermarket)"
"Therefore it is important to use the gauge and matching sender in your project"
So, bottom line question....any sender is OK (providing its mechanical fit is correct) and calibrate it correctly, or do I need a specific type?
Cheers,
Glen