I have been trying to find correct speedometer driven gear for my 1954 ford-o-matic.  I have tried two different gears but they seem too small in diameter and do not make contact with drive gear.   Could somebody please help me get the right gear, a picture, a part number or any info, that could help,  I may also have wrong cable, it is type with retainer clip to hold gear on,   Any help will be greatly appreciated.   Bill