I am sorry for the vague description. The movie had a guy much like mad max character same type of setting There is a car trailer he has a couple cars to choose from there is a cobra on the trailer don't remember much else. There is also a monster truck in the movie at some point.

Were sev movies like that... 1 I remember starred, I think, Jan Michael Vincent. (If not him, same body type, blond.) maybe check his flicks...

Maybe "Escape from New York" and "Escape from L.A." Starring Kurt Russel as Snake Plissken.

Escape from L.A. (1996)

Escape from New York (1981) - Plot summary