This is the new type gear intended for the late 80's and early 90" Dodge/Jeep with the screw on speed sensor but will also fit the cable type application as well but MIGHT require the inner drive wire to be trimmed down about an 1/8" or so.
We have these gears in 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 and 43 tooth counts. Here at American Hot Rod Solutions we would be happy and ABLE to answer ANY speedometer question that you may have. We have many speedometer gear solutions available for just about any Rear wheel or 4x4 car or truck made by Ford, Lincoln, Mercury, Chevy, Buick, Oldsmobile, Pontiac, GMC, Dodge, Chrysler, Plymouth, Jeep, and others.