You might want to let the editors of JP know they have it wrong then.
Sure, blame it on the editors of JP.
Oh, those guys at JP missed the subtle differences in the first Scrambler introduced in 1981. The first indication is visible in the original picture previously posted showing the small notch in the hood on the driver's side (only found on early 1981 models).
Also, the following picture clearly shows Narrow-track axles when viewing the rear wheel depth inside the fender extensions.
Also, JP's article noted the 1981 option SR4 tranny, and the uniquely curved gear shift is visible in the following picture.
This last picture is a pretty good shot of an 8" chrome wheel. Although these 8" chrome wheels may not be exclusive to the 1981 model year, they are still a pretty good clue to conforming with or confirming the other '81 characteristics.
Also, an additional picture from the JP article shows a close up of the windshield frame, and I believe that the '81 model may have been the only one that didn't include the horizontal structural rib near the wiper locations.