To run 35's with stock fenders you must install 2.75" front bump stops and 2" rear bump stops. Nothing else really matters from a suspension perspective as long as you have decent back spacing on your wheels... This is to keep the tires out of the fenders.
So, if you put on a 2" front spring spacer you lose about 3/4" of suspension travel in front and about 1" in rear with a 1" spring spacer. On the road, not too noticeable if at all, but occasionally over a speed bump or something you might bottom on the bump stops, no harm no foul, that's what they are there for.