The rear seats were a non-issue as far as servicing the vehicles because other problems outweighed any seat issue. The MPV comment I made is just based on what was mentioned in one of the schools at one time and the designation on the door jam as such.
The early ones were prone to chronic carburetor problems and gearshift lever leaks; the latter being a transmission destroyer if unnoticed and unattended. It was a very poor design and one has to wonder what the engineers were thinking. The later ones were much better (different carburetors and redesigned shifter shaft) and I would personally love to have an '85 or newer if I could find one that was clean and not beaten into the ground.