I had a Columbia two speed rear end for my old F*^$ when in HS and it had a torque tube rear. It seems like someone would still offer such a device especially with gasoline becoming a hose-armed bandit.

1953 Chevy 5-window 3100
In the Stovebolt Gallery
More pix on Picturetrail

Dave
Engine & Driveline Moderator

If you can't make seventy by an easy road, don't go. ~~ Mark Twain