I have a 660 case Muncie for my 68'. Can anyone tell me what the stock shifter arm number's? I have number's for the 69's but they are bolt mounted and the 660 is stud mounted and I have been told there is a differance in mounting size from early to late style. I have a shoebox of arms but they all look the same after awhile of looking at them. I may have to call Hurst if I don't have them. Almost forgot....this is for a Hurst Comp.Plus shifter. Thanks all.