What frames interchange with 1979 Chevrolet El Camino?

The 1979 Chevrolet El Camino used a GM G-body platform. Therefore, it shares many frame components with other GM G-body cars from the same year and sometimes even close model years. However, it's not a simple direct swap in most cases. While the *general* frame design is similar, there are often differences in mounting points for specific components like the suspension, engine, and body.

Direct frame swaps are rarely done, and usually only with significant modifications and custom fabrication. Trying to use a frame from a different G-body car like a:

* Cutlass Supreme: Likely the closest match, but still requires significant work to adapt.

* Monte Carlo: Similarly close, but will still need modification.

* Regal: Also a G-body, but again, modifications will be necessary.

would still require extensive modification to fit the El Camino's unique body shape and potentially different suspension components.

You're better off repairing or reinforcing the existing El Camino frame unless you have significant fabrication and welding skills. Finding a donor frame in good condition is also difficult and may not justify the labor and cost compared to repairs.