Some would also describe that feeling as: dead, unresponsive, beached.
How any of these 30+ year old cars feel at speed has much, much more to do with the condition of the car then anything Nissan engineered. A 1969 240Z with a complete suspension re-do will feel light years better at 120 mph the a beater 1983 280ZXT with three blown shocks and air for suspension bushings.