i've had 3 Zs (2 were manual and 1 was power steerint)
the 1st z seemed to have a pretty effortess manual steering, much like my 64 Corvettes manual steering..
the Z i hav now came with manual, and I coudln't take it anymore... either it wasn't rebuilt properly, or those E70x15s really grab the road..
i put power steering on the car just as John Z did (in fact our cars are almost sister companions as the only difference is I have an endura front bumper and delux seat belts with Standard interior, and his has delux interior with standard seatbelts. Aside from a few other differnces, I too couldn't take the manual steering in this car and coverted it over with all factory parts as well....
can you feel the road better? I don't see how, the power steering is much more responsive to me and turns on a dime.