Chevy is a brand of car, and butterfly doors mean the doors were modified so that instead of opening normally with hinges at the side and swinging out, they have hinges at the side or top and swing up (which looks like a butterfly's wings)
the governor of a certain state is the one who can tell the warden of a jail to wait and not execute someone if they are sentenced to die, and instead pardon them because of evidence that they might not be guilty (or for any other reason)
try to take his weed/marijuana, it is considered a crop since it comes from the marijuana plant which is grown like any other crop, sometimes among other crops like in corn fields to hide it (because growing weed is illegal).