1966 Barracuda AM/FM radio part number?

slantsixdan said

'65-'66 Valiant FM-AM radio, model 372: 2661 687 (for '66 Valiant use with bezel 2580 748).

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This would be the correct one for a '66 Barracuda? Would it look exactly like the one pictured by 1969CUDAMAN in his 1965 Barracuda?
I seen one similar but it was model 367.
Also how would you accommodate the third wire?

Thanks fellas