I can give you bumper heights of:
ground to top of front bumper 22.5 inches and ground to top of rear crossmember 22.5 inches
But these are not truely correct as they involve tire size and pressure. So instead, the distance from center eyes on the shocks will give a better idea of where your springs are in relation to the frame. I have just under 15 inches on the front shock and 17 and 3/8 on the rear. This "at rest" measurements include factory medium ride springs for a hardtop model. Plus, they sag over the years and with use, but it should get you in the ballpark.
1975 CJ-6 1983 CJ-8
1986 CJ-7 Laredo 1986 TJ-7 Trail Jeep
2003 Inca Gold TJ Rubicon