There are locating studs in the bulkhead that dictate how far down it can go
You "may" be able to lower it on these but I would worry about the uj's at the bottom tangling up if you put too much angle on them, plus it may foul on other parts too

Just make sure that you properly strengthen any potential remounting as the studs may not take as much load if you lengthen them and may pull through the bulkhead panel