wtb sbm floating rods

340 rods are bushed at the pin hole; all the other factory small block rods are not bushed. Whether or not you need a bushed rods will depend on what type of piston pin you have - is it pressed onto the rod? If so then 340 rods are not what you want. Is it held on with snap rings on the sides of the pin holes? Then you want a bushed rod.