I had already converted the original dash and gauge to an Autometer branded gauge - it was the closest size and depth to fit behind the glass etc....you could say it was a no-brainer using Autometer. Recently swapped out the stock fuel sender unit and tank, so the new gauge had a different range and required the dash mods. Simple, I just bought the correct range for the sender.
Start with a little dissection...hacksaw time...
The gauge needs cutting open to get the internal parts out....
A small mod to the original gauge - this was done 9 years ago....