Not quite sure what you are referring to as a spec, but the white wire out of the terminal on top of the coils are for a tach connection and work exactly the same as any tack that connects to a coil negative for it's signal. (most of them do)
Yes, the kits are everything needed to swap to HEI ignition with our factory style distributors.
They eliminate all of the OEM box and wiring as well as the stock canister coils and ballast resistor, while greatly increasing the power and reliability of the ignition system.