I have decided to look for a car with a 170 slant 6 and an automatic, preferably a 4 door. Nameplate not important. I want a super reliable and durable car. What were the most common, and what would be the cheapest to maintain and drive? What might be harder to find body parts and trim for? The early 60s models look great with the swoopy styling but seem like they might be harder to find parts and trim for. Issues to look for? Most cars I see for sale have the 225, but I would really like a 170. Thanks!