R.v. - 440/727

Might have found a RV with a 440 and a 727. The owners are an older couple that use it as a garden shed now.
Trying to get them to sell me the engine and tranny without disturbing the RV.
Have not convinced them yet.
I do not know anything about big block mopars is this worth going after?
Later on down the road would probably rebuild it for a project.

thanks.