So JS Restorations informed me:
The 2983695 is the actual part number stamped into the relay and the 3420885 would be the "over the counter in box" version sold by the parts department at the dealership. Are there another aftermarket ones being produced? Generally where would I locate the buzzer. A guy at NAPA said they can get one for a '71 any difference and would it still work?
Thank you!