It's weird ,but, I have 2 SC's both are 1990s 1 is auto the other is 5spd 1 was abused the other wasn't.They both blew head gaskets at 116,000 and change.
My '89 popped the gasket when it was my daily driver. I was 2o years old and a lowly E-I-Owe-You-1 in the military. Couldn't afford to keep putting money into it every other week, so I cut my losses and traded it for a Ranger. That was 8 years ago. I think the car had just about 100k on the odometer. It was a 5 speed.
To my knowledge as the previous owner stated one of the sides blew and ford repaired it under warranty. Not exactly sure how many miles but probably not many if it was still under warranty. Anyone know what they came with for warranty???
The orignal motor had 149k and the original gaskets just no oil pressure. The replacement {used} 1991 motor had 78k when the head gaskets started leaking water outside the block. Never overheated and no water in the oil it just looses a quart of coolant every few months. Still driveable and dependable I just dont like leaks of any kind.