My "x" daily driver was a bone stock automatic 75 280z 2+2, and I've had it up to 135 on a backroad, handled great, no shimmy after 100 in the front end, had more pedal left, I backed off due to not being able to afford a ticket. I ran the piss out of that car every day and loved it. The car had rusted out rockers and radiator support, the driver side rear a arm bushing(rearmost of the two) was missing in action lol, etc. you get the picture. But no matter how hard I rode her,no matter what I threw at her she took it, EVERY DAY. Point- guess the ol gal handled better all wore out, holy, and soft than I ever expected, therefore bringing a deeper and closer love for the old Z's.