Yes, you can pull off the washer bottle neck, and I have also taken off the cross brace strut. It's a pain for sure, but I've done that change 2 or 3 times.
Mikey is right. I have 2 deltas and this year rears went on one and fronts on the other. I had to get sets from the dealer at an extortionate cost. It is useful for all Delta owners to know if bravo coils fit as the can be had for a 5th of the price. What is odd is the parts that came from dealer didn't match the eper system so something fishy going on. I have an original of front and rear so if they go again I will order bravo set and compare. Mechanic advised against lowering springs and I prefer originals. Also with stiffer springs may put more stress on mounts and wishbone which my alfa always had issues with. But at present it's definitely the cheaper option.