Charles Durning and Robert F Lyons
They were both good in this movie but it is not the first time they appeared together. In DEALING OR THE BERKELEY TO BOSTON FORTY BRICK LOST BAG BLUES the former was a corrupt cop and the latter a dealer in whoopee weed -
www.imdb.com/title/tt0068455/
It was interesting to see them both before they did DARK NIGHT OF THE SCARECROW.