Can anyone tell me if there is a difference in the heater ac controls on a 66 compared to a 67 Chevelle?

the levers are for a 66 two short and two long
On a 67 all the same length

The cables route differently also. The mounting points for the cables are different. If you reroute the cables it will work.

Thanks guys

Can anyone tell me if there is a difference in the heater ac controls on a 66 compared to a 67 Chevelle?

I put a NOS 67 controls in my 66 (back in 1985) with some minor adjustments supposedly until I restore my 66 unit. I never put the 66 control back yet.