Scott
AFAIK all the aftermarket (in-tank) pumps are all 12 volt and high pressure- 45# and more.
I have been told, but have not researched, that up to 1978 some Toyotas had in tank LOW pressure pumps that might be useful in an old carburetored Ford. These would also be 12 volts.
I've never heard of a in tank pump with a guage float, but I live under a rock a lot of the time.
Jim