The inspiration for this raucous John Wayne comedy was none other than William Shakespeare's "Taming of the Shrew", which producer Michael Wayne and director Andrew V. McLaglen thought would have even more of a comedic kick if it were set in the Old West.
John Wayne insisted that the role of the weak, insipid Governor be called "Cuthbert H. Humphrey", with the intention that he be seen as a parody of liberal Sen. Hubert H. Humphrey, whom Wayne intensely disliked.
SPOILER. When McLintock shoots Devlin Warren, we see a close up of Devlin as he raises his hands and backs away. We can see that his right hand is clearly empty in this shot, but in the next shot he's holding his hat in his right hand as he falls.
After McLintock hires young Devlin, McLintock drives off with Drago sitting to his left. The wagon turns around (off-screen) and heads out of town. After the off-screen turnaround, the characters have traded places in the buggy and Drago is now on McLintock's right.