Dropping a High school class

Hi,
I am currently taking 7 AP classes and would like to drop one of my AP classes due to the fact that in my junior year I also want to have some time to study for the SAT which I will be taking in the spring. If I drop the class it will be written passW even if I have a B in there. I don’t know what I should do because I really want to have the time to study for the ACT and SAT. I am currently enrolled in to AP Physics,AP language, College Pre-Calculus,AP art history, AP US History,AP French, and AP chemistry which I would like to drop. Do you think with a 4.3 GPA and a decent SAT score it would be ok if I drop one AP class due to the fact that I already have one drop pass class from last year. I do not want to ruin my chances to be accepted into a good college just because of a W in my transcripts. Would I still have a chance of getting accepted into a mini ivy with a drop class