a BIG 10-4 on being a HUGE pain to change out !
take out the wiper tray, and it will give you extra room for your arms and hands, as well as better sight to see what you are doing.
also, instead of taking down the exhaust, especially if it is a little crusty, by removing the crank damper/pulley, you can maneuver the pump out through the passenger side wheel well.
not a fun job by any stretch of the imagination.
too bad you have to do it in the cold........