Go to an empty parking lot. With car in Park, rev the engine to 3200rpm. Hold it there for a half hour. Did you like it?

OR,

Get on the interstate and put it in Second gear. Accelerate to 70mph. Hold it there. That's what 75 would feel like with 3.91s, assuming your original ratio was 2.92 or close.

When I'm driving 600 to 900 miles in a day, I sure don't want to be assaulted by a high revving engine. It actually increases fatigue and leads to unsafe driving.

Back in the day, there were those jerks who bought Porsches and then drove them in Second gear at 5000 rpm because "that's what the engine was designed to do". I sure don't think they were manly because of that. When I changed my '64Dog from 3.91s to 3.23s it lost that quickness around town but on the road at 80 it was a lot easier to make that 900 mile day. And my sexual orientation didn't change.

R.