Yes, it is a Toyota BH26 police car. I think the FH26 just had two portholes in the front fender. So the point is yours.
But it is not based on a Toyopet Crown RS chassis, but on the older H series chassis, hence the H in the model code. The bodieswere made in style of the Toyopet Crown RS, but with a longer hood to accomodate the six-cylinder engine.