My experiences that I was reflecting on were a few chebbie 350's a 307, and a fxrd SB too...
they were 27x-29x hwy gears going to 3.5x and 3.7x but man, it seemed like they were night-day differences at the time.
I have an open differential now and need SureGrip/Posi anyway.... I was holding out for 3.55 but shoot, maybe Ill just run 3.23 if there isnt going to be a noticeable difference on the streets.