While the overall frame structure remained largely the same—a unibody design, not a separate frame—the '75 model year saw a change to the front end. This usually involved modifications to accommodate a different suspension geometry, likely involving the control arms, springs, and possibly the mounting points on the frame itself. The exact changes would need to be confirmed by detailed specifications and parts diagrams for both years, but the core difference revolved around this front suspension update. This change might also affect the location of some related components like steering linkages.
It's important to note that the change wasn't a drastic overhaul of the entire frame but rather a specific update to the front suspension's integration into the unibody structure. Therefore, while generally similar, they are not directly interchangeable without potential modification.
