In one scene, Robin holds up the two romance novels she had written ("Ravishing Love" and "The Raging Rape of Savannah"). Between shots, the two books switch places from one hand to the other, even though she had not moved her hands in any way.
At around the 11' mark the sound operator contracts his book mike three times in three consecutive shots.
In the parking garage with Juicy and his gang, Mankowski pulls out his six shot revolver and shoots shoots a total of eight times before finally emptying the shells to reload.
The exploding car in the black and white cosh shot footage is way too modern for 1974.