Unlike Quick Draw McGraw's voice on the original Hanna-Barbera cartoons, he is meant to sound like actor Jack Palance, in addition to his facial expressions. But the line about prying the guitar from his "cold, dead hoof" is a parody of Charlton Heston saying "from my cold, dead hands".
Quick Draw McGraw saying "Get your stinking paws off my you damn dirty kids" is another reference to Charlton Heston, specifically, to his line from Planet of the Apes (1968).