A pm got me thinking about this question. So this rod has to be either bought to size or fabbed up. If you wanted to reuse your stock relay rod (rod from box to steering arm) What size tap would you use. Are there pitman arms that can use a stock cruiser ball joint and if so what is the thread size of the stock ball joint? I guess any cruiser year would work. Post up if you have any info 1 Type year of vehicle for pitman arm 2 Type of ball joint used with thread size 3 Did you use a modified cruiser relay rod. If not what did you use? 4 did you have to taper the pitman arm to fit the ball end (if so what size did you use?