1981 Ford 4-Wheeler Sales Brochure. Tough 1981 Ford 4x4 Pickup. The new frontier in 4x4's...Tough '81 Fords feature advanced off-road technology. Ford has the only American built full-size 4x4's with Twin-Traction Beam independent front suspension for a better ride than competitive leave spring suspensions. Highlights many other standard features. Includes options and specifications for Bronco, F-150, F-250, and F-350. Condition: Light soiling, mostly along spine. Small tear by lower staple.