as far I know on A bodies:
up to 72 all 2 speeds were foot operated and 3 speeds/variable with electric pump
73/74, the electric pump was optional with 2 speeds ( foot pump still standard ) and standard with 3 speeds
75/76, the electric pump was standard on all 2 and 3 speeds
On B bodies...
Up to 72 foot operated with 2 speeds standard but electric pump optional ( I can be wrong on this, but I have known of some Charger 71 being foot operated ). 3 speeds/variable electric pump standard.
since 73, all electric pump.
If I'm wrong on the foot pump feature at least for 71/72, then all were electric