5.5/7inch combo static drop questions

[tantrumpipeline]

I ordered my CPP grand slam without thinking to ask what rim size I should run 18 or 20's do not want different front and rear unless it's just a width difference and what size tires to put on them to ensure I'm not too close to the ground where I'm gonna be scraping everytime I drive it, also will this make for inner fender issues? any pics of this type of drop with info on rim and tires you're running would be a HUGE helper for me as well, guess I got excited a bit to be ordering and rushed into it