I have 1988 GB Europa.
New fuel tanks. The old steel one would most likely be at the end of there life.
The transmissions. Most twin screw Lehman powered boats have a BW CR2 velvet drive. The Starboard tranny has a idler gear that needs modified so it doesn't self destruct.
The sea cocks are old rubber plug Groco. Really good sea cocks if someone hasn't tried to open or close them with out loosing the T bar.
Built like a tank.