Normal to be able to spin valve springs by hand ?

Thanks guys. I don’t really have any history on engine or heads as far as rebuild. Seems to run good at idle and up to 4500 rpm. I’ll start digging into it more. Car is numbers matching and has 70k miles. It seems everything is stock except for an Edelbrock carb and an electronic ignition setup similar to this
Electronic Ignition Conversion Kit, Hi-Po ECU