If both front tires on a solid front axle vehicle have excessive positive camber, what could be the reason?

Excessive positive camber on both front tires of a solid front axle vehicle typically indicates that the axle itself has been deformed or bent. When the axle is bent, it can cause the wheels to lean outward at the top, creating that excessive positive camber condition. This alignment issue can lead to uneven tire wear and affect the vehicle's handling, making it crucial to identify and address the bent axle.

Other potential causes, such as incorrectly installed caster shims or improper toe adjustments, would not uniformly cause both wheels to exhibit excessive positive camber. Additionally, a bent drag link would primarily affect steering geometry rather than the camber directly. Therefore, the best explanation for the scenario described is that the axle itself is bent, resulting in that specific alignment problem.