150 in a convertible 5.0 mustang was enough as well. Decided that if I wanted to go faster the vehicle would have wings and would be steered by somebody far better trained than me.
CC
I drove just a teeny tiny tad below 150 in my old Supra a few times going down RT 3 in MA late night back around 1990 or so.
That was some scary stuff.
Just one twitch of the wheel....