I have a Standard speedometer gear that I would like to mount on my Dayton wire wheel hub. Its a 35 tooth 8P, part number 300. Does anyone know what the bolt circle is for the 1/4 inch diameter mounting holes? I am asking because I have to drill and tap the holes from the front side towards the back and need to know the proper location of the three holes. If anyone knows I would really appreciate the help. Thanks!