Speedometer gear?

[wes beem]

Trying to figure out what speedometer gear I need for my 70 dart. it has the 14" rally wheels 727 transmission and 8 3/4 reared. Prev owner said it has 4:10 or 4:11 gears, he wasnt sure which.

 

[dcl68]

Read this

 

[GTS Dave]

25 teeth - light green
26 teeth - red
27 teeth - beige
28 teeth - light blue
29 teeth - black
30 teeth - yellow
31 teeth - green
33 teeth - yellow
34 teeth - green
35 teeth - orange
36 teeth - red
39 teeth - green
40 teeth - orange
41 teeth - red
45 teeth - yellow

 

[wes beem]

thanks!