Ok cheers for the info - I have separated the pop rivetted section, and all bits will be going for blasting and power coat.

Now when I am at this - I am going to fit the pump wiring upgrade kit. Tonight I tried to check the voltage at pump, just to see what it is now.
I checked it with ignition on but car not running, and only got 0.5 odd volts.
Does car need to be running to get this voltage?