They are considerably simpler than a 240 - and more of the parts are designed with maintenance in mind (fewer special tools needed).

That car will be a 6-volt - and create some issues in either finding replacement bulbs, motors, etc or in converting to 12-vold. It has a previous generation B16 motor - parts for it will just be a degree harder to find than for a B18/B20 engined car (B20's were made in much greater numbers and throughabout '75).

The sheetmetal is easier to work on that probably any other Volvo because the body structure is simpler - and there is less to it. At the same time - that means that critical areas are more likely to rust out and fail. While I've seen 120 and 140 series cars still in driveable condition with rust holes large enough to chuck a cat through I've also seen 544/444 cars that still look decent outside with rear springs poked into the trunk or rear axles adrift. The bodies just aren't as massively overbuilt as the 120 series on was.

Great cars, however. They weigh hundreds of pounds less that a 122 coupe or 1800 and feel like it.