At stock ride height, they will likely rub because they are too tall (especially up front). Width isn't too much of a problem.
You could crank the torsion bar adjustments up front to raise it to avoid rubbing, but then you need an alignment afterwards. But it will look, in my opinion, wrong because the tires are just too big.
The stock tire size was 205-75-15, the police version used 215-70-15.
Much too tall. Back in the day (as is true today), it was very common for state agencies to run the same tires between different makes of squads. In the 80's that meant they used the 225/70/15 across the board, which worked fine until Chevy went to the 235/70/15 in the '91+ Caprice. Those were too tall for the M body squads, and a 235/75 is even taller.
The stock 205/75 and 215/70 are easy to find and very affordable.
To help find tires at same height but of different dimensions.. e.g. 205 x 75 x 2 / 2540 + rim size gives you height of tire in inches. You'll notice that 205/75 and 215/70 are almost the same height. Just make sure the rim is wide enough for the new tire size, which should not be an issue.