My 87 was sold to me with a bad odometer (cracked gear), but the seller claimed that it is a ~180K car that had never been rebuilt. I later found out through some compilation of service records that the odometer went bad @ ~45K and the actual mileage is closer to ~90K. After 2 yrs of no issues passing GA emissions, and good performance, I've recently pulled the motor to fix a rear seal leak, among other oil leaks. A cold leakdown test showed ~18% in 1 cylinder with all of the rest under 6%. IMO it would have run another 40-50K with proper maintenance, but I'm doing the rebuild.
I'll agree that these are easy 150000 mile + cars with good upkeep and good driving habits.
87 939 Slant