To use a newer frame, you'll need a significant amount of fabrication and modification. Popular choices often involve:
* Custom-fabricated frames: This is the most common route. A chassis builder will create a frame tailored to your needs and the body of your '56 Chevy. This allows for optimal fitment and desired features (like upgraded suspension).
* Modified frames from other vehicles: Some people adapt frames from other vehicles, such as:
* S-10/Sonoma: These are popular choices due to their relatively narrow width and availability, but considerable modification is required.
* C10 (later models): While a '56 is significantly narrower, some enthusiasts have used later C10 frames with extensive modification. This is more challenging due to the greater size difference.
* Other donor vehicles: With enough fabrication skills, virtually any frame could be used, but it would be a very extensive project.
Regardless of the frame chosen, you'll need to:
* Address the different wheelbases: '56 Chevy short beds have a specific wheelbase; the donor frame will likely need modification to match.
* Relocate mounting points: Engine mounts, body mounts, suspension components—all will need to be custom-fabricated or adapted to the new frame.
* Consider the suspension: You'll likely upgrade the suspension while you're at it. This means integrating new components (springs, shocks, control arms) that fit the new frame.
In short, it's a major project requiring significant fabrication skills, welding expertise, and possibly a professional chassis builder. It's not a simple swap.