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Like it was posted the 66 units are very hard to find. Your best option is to find a 67 set and have the 66 under dash harness made. You can also buy the 66 rally pack main engine harness & they can also make the under dash harness from M&H Electric. The 66 & 67 are the same tach/gauge units but the wiring is different. I can refer you to a company that can restore the unit and that's highly recommended . There is a difference between the 66 & 67 dash bezel too. The difference is in the wiper switch pocket but you can use the 67 dash bezel with the 66 wiper switch.
Like it was posted the 66 units are very hard to find. Your best option is to find a 67 set and have the 66 under dash harness made. You can also buy the 66 rally pack main engine harness & they can also make the under dash harness from M&H Electric. The 66 & 67 are the same tach/gauge units but the wiring is different. I can refer you to a company that can restore the unit and that's highly recommended . There is a difference between the 66 & 67 dash bezel too. The difference is in the wiper switch pocket but you can use the 67 dash bezel with the 66 wiper switch.
Mike
Again - Thanks Mike will take you up on that info if I manage to locate a set.
I have a '67 Rally Pack and two complete sets of '67 wiring. Could I use those on a '66 dash bezel? Asking only out of curiosity, as a sidewinder tach is "Plan A."
I have a '67 Rally Pack and two complete sets of '67 wiring. Could I use those on a '66 dash bezel? Asking only out of curiosity, as a sidewinder tach is "Plan A."
The cluster yes the wiring no. The under dash harness is different 66 to 67 and the main engine harness is also different 66 to 67. You can use the 67 cluster but will need to buy the 66 harnesses.