I would like to change the stock rear shocks on my 1300c. The progressive 430 is what I would like but they only come in 11.5 for the vtx. They come in 11. For Harley. How can I if all put these on my x ? Would I need a new bolt to match Harleys size ? Change bushing ? Fab up something ? If its possible would the dyna model shocks work ? I know nothing abought suspensions so hopefully someone has done this before. Thanks