Like pbgbody, I'm not an engineer either but wagons do weigh more. More importantly, its where the extra weight is placed. Its all behind the rear wheels. If i stand on the back bumper, the rear of the car will sage more than if i stand on the middle.
the 79 Malibu coupe is 3219 lbs and the wagon is 3379 lbs, same engine and transmission so there isn't much difference in the rear weight
1979 Chevrolet (USA) Malibu 3gen Base Coupe full range specs
All Chevrolet (USA) Malibu 3rd-gen. Base Coupe versions offered for the year 1979 with complete specs, performance and technical data in the catalogue of cars.
www.automobile-catalog.com
1979 Chevrolet (USA) Malibu 3gen Base Wagon full range specs
All Chevrolet (USA) Malibu 3rd-gen. Base Wagon versions offered for the year 1979 with complete specs, performance and technical data in the catalogue of cars.
www.automobile-catalog.com