maybe something helpful here : Assorted Engine Analyzer Manuals from Sun, Allen, Thomas : Sun Electric Co., Thomas, Allen and other respective authors / manufacturers : Free Download, Borrow, and Streaming : Internet Archive
i use simple green in my ultrasonic to clean brass clock parts. works great for degreasing. a quick spritz with brake kleen before they dry eliminates any haze.
missing a lot of trim including the red white and blue on the quarters. i would say definite repaint. needs interior , top, boot, wiper motor and a few odds and ends. looks like a stalled project but it might be a bargain if the bodywork is good.
this car needs someone to save it, if the underside is reasonably intact. take it home, clean it then assess it. if you don't fall in love with it, flip it.