Car was mostly original when bought. The only major repair was an oil pump replacement. I believe the engine has never been rebuilt and it does smoke some, particularly at start up.
The 1966 Riviera was and still is a classic beauty. It rides and handles very well. the 425 engine is quite reliable, but is seriously thirsty. The interior is beautifully laid out and the cars are usually optioned with all the bells and whistles.
Do you have a 1965 or 1966? it's not clear from your review.
I greatly admire the 1965 model, especially the GS version.