Originally Posted by REGAL GUY
Tooling cost millions and millions so they just don't go out and spend 500 million on
a new frame stamping machine.
Agree completely. Never said they did. They change dies all the time though, same machine different dies. Same with stamping metal body parts. When they shut down B-body and F-body production in the 90'* and early 00'* to build pickups and SUVs they didn't swap out the presses, just changed the shape of what they press. Still doesn't mean a Suburban has the same frame as a Camaro.
The back of Seville/Eldo/Riv/Toro is essentially a trailer. Quite different than the back end of any Nova (except the awful one built by Toyota). It can be stamped out by the same machine, as can the frame for a B-body or pickup truck.