If this were originally in a fuel injected car then I would say ditch the Facet pump and buy a fuel injection to carb FPR, not too expensive and kills two birds with one stone.
If you are stuck with the Facet pump then it can be fitted on its own somewhere between the tank and carb, no tank return is required.
Whilst the pump will continue to run with the ignition on, once it reaches a certain pressure it will stop pumping and just maintain the pressure but in the event of the fuel line being broken it will continue to pump fuel out if the ignition is on.
The aluminium Malpassi "filter king" regulator / filters were popular in their day. I would be wary of the glass type as the glass can break in the event of an accident.
There is a Malpassi FPR only version also available.