The engine movement under torque is basically side to side rather than fore to aft so if you have clearance it should be good. That being said it is a balance between rear clearanc and fan clearance and I prefer to have more fan clearance so tend to bias toward the rear.
Yes, the side to side is what I'm concerned with. The passenger side is close on the corner. Can't move the engine over very much but sliding it forward will give a little bit more clearance around the curve. Maybe I can get a slight bit of lateral movement too.
