Had a 1990 300ZX in the shop last week. Owner noticed low oil pressure readings and shortly after the motor seized and shot a few connecting rod bearings out the sides of the oil pan!! Found him a used engine in Philadelphia and got him back up and running !!
After further inspection it became evident his clutch was on its way out so I went ahead and replaced that too!!
I also discovered that his master cylinder was leaking brake fluid down the fire wall and onto the drivers side frame rail where it was starting to eat away at it. So I went ahead and took down the rust to bear metal with some scotch-brite pads on the section of rail, etch primed it and then sprayed it with under coat. Of course I replaced that faulty master cylinder as well!!