shouldnt do that swap, 1. you can get motors cheaper, 2. thats to much for the car.
police cars are fine to buy, we own a 00 B4C camaro with 160,000 on it, a 01 B4C with 130k on it, a 95 caprice with 95k on it and a 00 impala with 117k on it, all run/drive fine