My first car was a 70 Belvedere police unit. RK VIN. The cars with 383 and AC were non HP units painted blue.

My 69 Superbee factory AC car is also a non hp engine painted turquiose and not orange.

If that care was not 3000 miles away it would be in my driveway. And yes they were basically 4 door RR's. I had mine fitted with a GTX front clip and tailights and had the buckets and center console installed.