You keep saying 111k miles but it’s the fact it’s like 30 years old is the problem. If it was 4 years old and taken care of with 111k miles I bet it would be flawless. I owned the exact same Camaro Z28, in purple paint when it was around 5-6 years old. Fun but dangerous driving car, especially in rain as it had no electronic driving gadgets, also was governed at 103MPH which was a joke considering how fast it would get there.