@greenbean.sixpack
Dem slab foundations were shìt in that time period. If it has already been repaired with piers, that's almost always a sign there is more to come.
Composite/engineered wood products and other engineered building products were becoming a thing, but they weren't dialed in yet and lots of nasty stuff was inside.
You may have cast iron pipes which means lead connections or even worse, galvanized pipes. You also have to be on the lookout for Aluminum wiring and Stab-Lock electrical panels. Both are big fire hazards. Asbestos and lead paint of course as well as broken down mineral wool insulation in the attic that is extremely fine and infiltrates your living space and attacks your lungs.
Those houses are basically a plot inspiration for Final Destination on different ways to die.***