OK so I have an 82 300d turbo with an engine that has 100k a transmission that has 45000, and a car that was poorly maintained and has enough electrical, vacuum, and interior problems to keep me going for years without ever making it acceptable enough for my wife. I was looking for something better maintained. Should I just hold on to the 82 300d and swap the engine if 3.5 liter craps out? I was planning on selling the 82 300d to someone with more patience. But perhaps it would be worth more to me for just the engine?