You don't need to rotate engine forward to change them but they are hard to get at.You could disconnect the pivot assembly at the front of engine and the engine will come forward a little but hard on the flex exaust pipe. You can access one plug up through the passenger side wheel and the others from underneath. I removed the three coil packs on top and reached down from the top to change all three in the back. AGAIN.......they are hard to get to.
There are lots of threads on this, so check them out.
Kevin