I have a couple sets of Z-broz A-arms coming (1 original style and 1 new style) and I am wondering what Polaris part #'s are needed to mount on the IQR bulkhead? I'm guessing that the spherical ends are dimensionally the same since the RMK's started coming out with A-arms ('05). wondering what fits and if a certain part number holds up better than the others. Thanks!