Suspension travel?

[Firstgenfan]

Need a lil help here guys! I got my explorer 8.8 in on my new TCI rear leaf kit and it needed to drop a decent amount to satisfy me lol. I threw in some 2" blocks I had laying around to see what that would look like but I really want it down another inch. I'm worried about clearances though. I have 4 3/8" from the diff. tube to the frame rail and the same from the top of the diff. center section to the bed. If I go another inch lower is that too close? There's no bump stops on there yet either. I don't have any weight in the rear now but if I sit my fat arse in the bed it lowers a lil bit but not much. I also assume the springs will settle in a lil over time? Any help is appreciated!!

Here's how it sits now