No compression-next move?

my68barracuda said
spring pressure with the valve closed is the attainable spring pressure at the installed height.
Typically in the high 2 digits to low 3 digits Ft lb.
Not enough to straighten a bent valve stem. But I agree, with a worn guide or a very slight bend in the stem, it would be possible for the stem bend to be contained within the guide diameter. That is why the stems need to be measured for straightness.

You don't need enough spring to make the valve straight. All you need is enough spring load to make the valve head conform to the seat. 100 pounds on the seat will seal a valve that is bent. Undercut stems, smaller than 3/8 stems all make it even easier to seal a bent valve.