I had a Luftmeister 7%-11% gear set in my '85's transmission and I really appreciated it since I was forever searching for 6th, 7th or even 8th gear. That is a 7% taller primary ratio and a 11% taller 5th gear. The thing always felt like too much rpm at any speed. Took a long while but I finally realized I am more of a twins guy. Fours are just too busy for my tastes.
Frank