I think you answered your own question. Keep the 89 ! It only has 160,000 k on it with no trouble. Chances are you'll get another 200,000 k without anything major, other than normal maintenance items, brakes, tires, timing belt, etc. Our 82 240 has about 500,000 k on it, let my son down last winter, timing belt went, $40.00 to tow it home and $29.00 for a belt. Only time it has ever let us down.