I’m inclined to believe that there’s no difference in curvature between the 1997 and 1998 models. If a change were to occur, it would likely be between the XL and XLII models.
Here’s why I think so: The chassis is assembled using an intricate welding fixture that’s tailored to specific dimensions. Altering the roof-to-side curvature would require a modification to that fixture, which seems improbable given that a complete chassis redesign was on the horizon, necessitating a new fixture for the updated design.
Perhaps there’s some confusion around the timing of the change, possibly mixing up the riveted buses with the bonded skin models?
Jon and Di
2006 Liberty Elegant Lady, 2021 Jeep Grand Cherokee, 1950 Ford
Knoxville, TN