Hell of the Living Dead/Zombie Creeping Flesh is bad and inept in every way imaginable, but it's a laugh riot and highly entertaining. Some class lines of dialogue in there too, such as...
Vincent: Patience is the chief virtue for those who have faith. Mahatma Gandhi, New Delhi, 1946.
Lt. Mike London: Up your ass. Lieutenant Mike London, Shit Creek, the year is now.
SWAT Team commander: Just be careful you don’t get your balls wasted!