Re: New 66 and New to forum
I think the green dot tranny is what they call a dual range selection. That means you have 1st gear which is all the way to the right/ then you have the green dot which is what you would call Drive....meaning if left in that green dot you start in 1st and automatically go into 2nd then Drive. Then if you select the spot just left of the green dot then you start in 2nd instead of 1st and it'll go into Drive by itself. This is Fords first idea of what the C4 should be but people didn't like it so Ford changed over to the Select range type which is what you find in later Fords with C4's meaning 1st, 2nd and Drive.
The green dot is fine for crusin around but weak for racing if you have over 300 hp, the input shaft on these green dots are smaller and tend to break. Also some good news is you can swap out the valve body for a later 67-69 C4 valve body and get the later gear selection that is favorable 1st, 2nd and Drive. Then you can select the gears easier for racing around when you get the need to. Hope all this isn't too confusing.
Looks like a really nice interior on her.....I don't know if you know but there are several good parts places to get quite a few new this and thats, there are also Mustang parts that'll interchange easy such as front disc brakes. Do you know what you want to do with that 66, restore it stock or modify it some?