There actually was a 4 speed with OD on 4th. gear, 3rd. was direct drive. Just one problem- - - -it was installed in Ford pickups, behind the 300 cubic inch 6 cylinder. The trans was pretty flimsy, and the too-high rear end ratio made it necessary to slip the clutch badly to get moving. You might get it to work on a Chevy with some creative adapting on the bellhousing bolt pattern and the center hole for the input bearing retainer. Use a Ford clutch disc, and a GM pressure plate to make things hook up.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!