Mounting in the rear is no trouble. You will obviously need to alter the loom. I would consider running a single airline from the back to under the seat to an ally manifold for the solenoids so you don't have to run all you activation wiring and hoses all the way to the back.

I would install the vent kit for the solenoids though. You have been lucky ab. Not hard to make as it's basically just more air line from the exhaust port on each solenoid. Without it they vent to the cabin.