You NEED to enter a Ford build date for your car since everything Shelby is build date specific. You might just enter the SAI build date as well.
With a 10/22/1966 SJ build date you need an early radiator. You shouldn't count on a complete radiator either as you are after the tank's date and don't care about the rest. The tag is reproduced. The radiator top is not.
As for the center of dash piece -- what do you need for condition? Are you doing a survivor? Same with dash. A survivor or driver dash is different than concours.