The top link will probably foul the body, as both of mine do before it reaches the top of it arc. I wouldn't bother making longer arms as your just moving weight further away from the axel. Either don't lift it as high (as I did) or cut a channel into the floor for the top link to rise through. Are you making a 3 way tip for the chip box or are you going to have to take the chipper on and off to tip?