I've got a complete LO3 out of a 1990 Camaro RS. I don't know the mileage, but it was pulled from a wrecked car. so it was obviously running up til the accident. I got the motor with the '84 Z28 I bought, and I'm just not going to use it. the guy I bought the car from was going to put it in the '84 but never did. he claims it had low miles, but who knows. this thing has EVERYTHING...brackets, pulleys, ac compressor, alternator, starter, throttle body, exhaust manifolds, etc etc etc...
I'd take $250 for it, you pick it up. I'm in north/central arkansas,

 

I got a chance to look at the donor car this engine was pulled from. it had 120,xxx on the odo. so I imagine thats the correct mileage for the motor.