Do you feel as if AP Lit or AP Lang would better prepare me for the English, Reading and Essay portions of the ACT?
IMO, AP Lang would better prepare you for the English section, but AP Lit would better prepare you for the Reading section… not sure about the essay. Personally, I took the ACT twice before taking either of those tests, and I managed a 36 on the English section both times, but reading comprehension might be more intuitive for you than grammar and such, so make sure you take your personal strengths into account when picking an exam.