The xxx_top.asc has the tops, and the xxx_mod.asc file has the thicknesses. The
file nad27_dis.txt has the discretization parameters in MODFLOW format. MODFLOW
neither knows nor cares about projected coordinates so:

Upper Left cell center is at 394375., 3972500., the grid has 220 columns and 
453 rows, and the spacing is 125 meters (uniform)in both dimensions.

The file huftemp1.dat is the complete processing file for the formula processor
operations, and you can look at points. The relevant output fields are compz1 
through compz7, top to bottom.