Sedan VS wagon

Both sedan and wagon 91-96 have a wheel base of 115.9"

So does that mean a chassis from a sedan will interchange under a wagon?
Planning to pull the body of my wagon off the original frame at some point and swap in a well protected frame so I can keep her rolling into the 300k's just trying to plan ahead.....

I think they are different, but don't quote me. I do know that the rear trailing arms/LCAs are actually further apart from each other on a wagon vs. sedan, enough that a 71-76 Chevrolet rear bar will bolt right into a 91-96 wagon, even though the 77-96 cars use the overall architecture of the 73-77 intermediate size cars. However, this will not work on a 91-96 sedan...

I'd say that alone is evidence enough, but I'm sure someone else here knows better than I...

Wagons are wider in the rear than the sedan, frame is also longer. I forget where the frame starts to widen, but I think its before the LCA's.

Rear suspension mountings are further apart. I think I've heard some of the rear bushing mount differently too? Either way the two frames won't really interchange.

The wagon frame is also fully boxed I believe, the sedan frame has open frame rails in the middle. Also the wagon has a reinforcing bar joining the two rear frame horns together. Here's a couple parts diagrams I grabbed from work real quick. Perks to being a parts guy Doesn't show much really but you can see the rear brace on the wagon. The frames are more different than these diagrams make them out to be.

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