My headliner started to sag.
Little rust on the back window.
The car was a victim of the "gas shortage" issue of the early 70's.
But fortunately Chevrolet left enough old school in the car to work with.
I puchased it in 1986 when I was 17.
Over the years I installed a 400 small block and 350 trans, and many other stronger links without many modifications.
It handled all with the might of the true muscle cars that came before.
You are correct with the modification aspect.
The car that was equipped the small block and that left room to put a stronger mouse under the hood.
If it had the 200 transmission the 350 trans only needed a driveshaft cut.
Wish chevy would come out with retro malibu or at least a 2door.