I have to say this...
To be "AceOfSprings" you sure do ask a lot of questions about them.
Sorry but I had to say it
Don't worry I'm just as likely to ask a bunch of questions about GPS software later on.
Feel free though man, that is why we are here.
Install without the rear spacer and see how you like the look.
If you want more lift in the rear, try disconnecting the rear sway bar, that should give you a little more room to play with.