When I bought my K series car in 1994 there was none of this namby pamby checking with the engine running etc. Wet sump engines were filled to the notch on the yellow plastic dipstick & the manual said it would take 4 litres with filter, & it did. There is also no mention of a foam baffle so gawd knows when that arrived. A few years later, as people became more adventurous with their cars, there were oil feed problems & we were advised to "overfill a tad"; most added an extra half litre. Then we were told to check the level with the engine running, or within 30 seconds of turn off. The Apollo tank arrived to remove the air & "which oil" became a religion.
Now I mention all this because the dipstick in my engine stayed the same in all it's incarnations until the dry sump arrived. Oil temperature could be a problem as too high a level led to the oil being whacked by the crank. I used to find if I kept the level of the oil at the notch, measured within a few seconds of turning off, this would enable reasonable oil temperature on track with consistant 4 bar OP (VDO gauge) in a straight line. Anything above & the temp would quickly head to 120 C & the OP would drop.
So that notch was "well cut" back in 1994 & I would find an oil change volume of 7 litres with Apollo would do the biz.
So yes check where that notch is & compare it to the high/low markings on the metal stick. Also keep a record of oil change volumes & compare the level. Keep a log of oil temperatures & relate them as near as possible to the oil level & volume added.