These four door sedans will never really appreciate much. These cars are so solid and dependable it would be an excellent regular driver. I would invest in a "replace every piece of rubber" restoration.
The smog pump is not needed so I recommend getting rid of it if you can.
Also, upgrade the ignition so you don't have to replace points every 10k. If its got the TIM ignition be ready to replace the module or change over to Petronix or the like.
And as always, please feel free to ignore everything I am suggesting and enjoy.