your going to find here, most people who run the set up your talking about are all street queens, so getting your question answered is going to be tuff.

id stick with a 9" wheel, the farther it sticks out the harder it will be to tuck.

whats your reasoning for running 4.5" backspacing?

PM wingman, i can't remember his exact set up before he body lifted but he might be a good person to ask.