I don't think this car was LAPD. All of the LAPD cars I have seen have been green, and the axle code on the tag is 999 due to the rear sway bar. Plus I believe 1970 was the last year for drum brakes, this car has discs. It is still a legit RK41N car though, which is awesome. Would like to see what agency used this car. There was a legit LAPD Belvedere for sale at The Nats.
I used to own a 1970 Plymouth Satellite that was a Seattle PD traffic car, it was a cool car to drive. The Seattle Police Museum has since bought it and restored it back to in service condition. Here is a link to the info on the car, I took the pic in 1999.
http://www.seametropolicemuseum.org/docs/Seattle_Police_Car.pdf