All coil springs have specifications for pressure at various installed heights. They can be shimmed for correct pressures (within the spring's range) required for different cams. They also have a spec for coil bind. Have a look at these TA Stage1 springs, http://taperformance.com/products.asp?cat=408 Some springs require machining of the spring pad to accommodate a larger diameter, or the guide needs to be machined for some inner valve springs. https://www.compcams.com/valve-springs-101
I’m not sure why TA left the spring pressure recommendations blank on most of these roller cams cards for the 350.
You have .990 coil bind on those, shim them. I went .060 to bring them back to new spec, +5 or so lbs. Int & exh valves are opening .584 with good valve control to 7k.
