Let me preface by saying I've been watching too many 1970's exploitation films. When my area switched to digital TV we got an obscure movie channel that plays films no station in their right mind would pay for. Among them are some of the worst blaxploitation films in history (e.g. "Blacula"). They are, by design, tragically ludicrous.
This was quick work, around an hour. No photo reference. Just bending lines and perspective however I like.