* Frame dimensions and mounting points: The 1-ton truck has a much heavier-duty frame, designed to handle significantly more weight and stress. The cab mounting points will be different to accommodate this stronger frame.
* Body mounts: Even if the frame were somehow adaptable, the body mounts themselves—the rubber bushings and brackets attaching the cab to the frame—are unique to each model year and weight class.
* Firewall: The firewall (the sheet metal separating the engine compartment from the cab) will likely have different dimensions and locations for components. This will affect the fit of the cab.
* Electrical systems: The electrical connectors and wiring harnesses will be different and incompatible.
* Steering column: These will likely be different, requiring modification or replacement.
The transfer case linkage hole is just one small detail; the fundamental incompatibility of the frames and body mounts makes this swap a major, highly unlikely undertaking. It would require extensive fabrication and modification, far beyond a simple bolt-on swap. It's generally not considered feasible.
