That would be a good gear ratio option for a direct-drive transmission like a TH 350 or 400. The overdrive 2004R will make the engine struggle to maintain highway speed as you'll be way below the optimum torque range, and gas mileage will suck like a Hoover upright vacuum cleaner.
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!