Here's why:
* Wheel well clearance: El Caminos, even with lowered suspensions, typically don't have the wheel well clearance to accommodate 26-inch rims, especially with tires of sufficient width for that rim size. The tires would likely rub against the fenders, body, or suspension components.
* Backspacing and offset: The backspacing and offset of the wheel (how far the wheel mounts inward from the outer edge) are crucial for proper fitment. 26-inch rims designed for other vehicles will almost certainly have incorrect backspacing and offset for an El Camino.
* Brake caliper clearance: Larger rims may interfere with the brake calipers.
* Suspension modifications: You'd likely need major suspension modifications, including a significant drop or lift, to make room for 26-inch wheels, and even then it might not work.
In short, while some extreme modifications *might* make it *physically* possible, it would be a complex and expensive undertaking, and the resulting handling and ride quality would likely be severely compromised. It's generally not recommended. Sticking to wheel sizes within the factory specifications or slightly larger, more commonly available sizes, would be far more practical and safer.
