I brought the springs to my machine shop and they told me they would give me a printout for $$$ or just confirm a 1.730" installed height for free, so I went with option 2. Seemed a bit ghetto to me but they said keep close to 1.730 and the pressures would be within spec.
When I go to larger valves I intend on bringing them the head and having them determine exact heights.
I have 3 different looking valves that seem to be generally lower than the rest and they will need the 0.050" height increase to work with the shedder/ring combo.
Thanks for asking though as I could have easily missed that one
