Nice piece of kit there 264!
I don't know how old your little lady is but boy she can still turn a few heads!
You should be able to calculate what the new front sight height will be required easily enough, but will need the sighting radius to do so
Pasted from another site.
The formula used in the Skinner Front sight calculator can used for various ranges and is depicted as follows in the Lyman Reloader Manual (Appendix B):

M= (D/R) x S

M= Movement in inches needed to correctly zero your sights

D= impact deviation in inches (how far off from the aim point to the point that the bullet is hitting)
R = range in inches
S= sight radius (distance between sights)

Example: firearm is hitting 6 " low at 50 yards

D= 6" R= 50 x36 =1800 inches (for 100yds it would be 100x36 = 3600")
S=20"

M=6/1800 x 20 = .067"

0.67 " of sight adjustment is needed to zero the firearm.

All the best with your little lady.
93x64mm