That 472 will pull anything you hook up to. In 1980, I pulled an 18-foot 3-axle trailer from California to Tennessee on I-40 with a 1970 Fleetwood Brougham. It had the 472/TH400 setup, and a pretty high-geared Cadillac rear axle. Gross weight of the car and trailer was 16,700 lbs. I made 2500 miles at 5 MPG, and negotiated a couple of major mountain ranges. No problems whatsoever out of the old Caddy, and the odometer turned over to 200,000 miles during the trip!
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!