Does the security system on a 1987 corvette stop engine from turning over?

No, the security system on a 1987 Corvette does not stop the engine from turning over. The 1987 Corvette did not have an electronic immobilizer system like many modern cars. While it might have had an alarm system that would sound if the car was tampered with, it wouldn't prevent the engine from cranking. Theft deterrence relied more on mechanical means and the alarm's deterrent effect.