Anybody go from 3:55 rear gear to 3:08?

[Dwight]

Coach had the same problem with his .82 Tremec. We swapped the main shaft and fifth gear. It's been a couple of years ago but I think the parts cost about $350 and we easily sold the .82 shaft for $250. He paid Eddie $200 labor to swap parts.
We pulled and installed the tranny in his Cobra.

[Dwight]

I found over the years IMHO 3.55 (3.50 for a nine inch) 26 inch rear tires and .062 5th gear tranny makes a great combination for a Street Cobra, Coupe.

Oh yea '66 Fairlane

You have enough gears for the street light and can cruise at 2,000 rpms.

Of course your cam plays a big part. Your motor small or big needs enough torque at 2,000 rpms to push your car.