@luc6189 Since both Oldsmobile cars and GM trucks could be had with a the 5.7L Oldsmobile diesel at that time, and GM being the only mainstream, American OEM in the late 70s offering a diesel, it reads to me that they were looking for either with a diesel. Which is still a horrendously weak and unreliable engine (I speak from experience). The aim of this column is to use the gift of hindsight and discuss the investment potential, nothing else. From that standpoint, an L89 Corvette is a good buy. With a GM diesel in the 70s, nobody wins. People have been pitching those engines and replacing them with gas engines for decades, and the ones still left original are near worthless. It is hard not to conclude it was a bad decision based off of that.