Generic spring shims come in .015, .030, .060 thicknesses........ So it's usually possible to get the installed height within +/- .0075 of the target.
Some of the higher end shims come in .020, and .050 as well......... But I don't come across those very often.
My CC cam 23-713-9 intake lift is .549' exhaust lift is .544.
This assumes the RR is right at 1.50, which HS usually are not.
And until you measure the lift at the valve, with full spring pressure, using either a solid or bottomed out lifter...... You won't know for sure what the net RR is(or the net lift at the valve, or the true distance to coil bind).
At this point, you're assuming the lift is .549......... Just like you assumed the installed height was 1.88.
