changing gear ratio from 3.23 to ? Street & Strip Experiences?

yes, a spare 3rd member would be cool.
Toyota had on the Turbo Supra a 4.10 rear. But those engines are living in the high end of the rpm band.
So 3.55 is the allrounder and you are guessing 3.91 is too short?
I never drove above 230 km/h. The engine has still potential above that. A lot I felt. But it's simply too dangerous. And Police doesn't stop because of all our old Porsches etc :)

5th gear, 5000 rpm, 230 km/h with my tires is the 3.55 (theory). At 5500 it is the 3.91.
currently it is at 4500.

Is the change from 3.23 to 3.55 noticable?