Even the wagons have Nivomats.
I bought my '90 765T in May, and soon replaced the shot Nivos with 745 springs and turbo gas shocks.
Last week I put the original springs and new Nivos($407/pr, delivered, from FCP Groton)on; the ride is much nicer.
Other troubles I've had:

Ignition and driver's door locks: These are known to leave you stuck in the middle of BFN. I got new ones, keyed to to the car, from the dealer, not as expensive as I expected, and you get a new key which fits all the locks. These are so-called "laser cut" keys, and I was quoted from $20 to $60 apiece. It's good to have a new one to copy.

Ignition switch: it didn't want to spring back from the start position. Unlike the 740s, your car probably has tilt steering, and the switch and lock change is the work of mere moments, with no scrunching under the dash.

Transmission mount: I'm always suspicious of the motor mounts, too.

Strut rod bushings: The PO and a highly respected indy shop chased front brake vibration for the last 10 years; they still vibrated when I bought it. ipd urethane strut rod bushings cured it.

The usual caution with a turbo: keep all the cooling system parts up to snuf; the heater valve and hoses are easily overlooked, and can catastrophically fail.
--
Jim McDonald