cross bike set up
always use a stem a 1/2 cm or even 1 cm shorter than your road one, so that you are sat further back over the back wheel. you cannot set the saddle height with reference to a road bike, as the soles of cross shoes are twice as thick as road ones so if anything the saddle is higher. also the height of the handle bars should not be set up with reference to a road bike, as the front forks are longer on a cross bike. use any reference from the top of the saddle and measure down to the top of the bars.
mark the seat post and stem with tape and then spend time moving things up down back and forward till you get comfortable, its a black art and I still have the same measurements from the 70's, hope this helps.