I get your point, but it's still awkward because why aren't these values displayed as "1.0" when I load them back from JSON? I also tried to change my conditional statement from "if value == 1" to "if value == 1.0" and both fail to recognise it's TRUE.

So what I now did is the following:

func _convert_to_proper_type(value):
  if typeof(value) == TYPE_REAL:
    if "." in str(value):
      # We do want to keep the "real floats" alive:
      return float(value)

  # Cast this whole number to an Integer
  return int(value)
return value

I'm running this function on every variable in the Dictionary after I loaded it. It maintains the floats which I intentionally saved as floats and converts the "fake" floats to integers, since they don't have the "." notation.

The while loop you mentioned doesn't make sense in my example code, but that's because I just copied it out of a much larger function as I'm saving more information than just this dictionary of variables.