Hi 70Mach,
The carb with the solenoid still attached is a D0OF-AB (4 speed carb) and the loose solenoid came off my 70 Mach , auto, AC 99% sure that it still has it's original D0OF-AD carb on it, but the car is in storage 70 miles away, so it may be a little while before I can confirm it ....
I have another D0OF-AB carb that also has the same solenoid on it, so I can't imagine that all three have the wrong solenoid on them, but I guess anything is possible. ( for what it's worth, That's the only style solenoid I've seen on a 70 carb, can you post a pic of the part you bought ?? )
John