I got 29 on ACT. How can I score on SAT?

I struggle on ACT reading because I can’t read any faster. Even though I scrore 35 on my English and have a composite score of 29, I think my SAT score will be better since I really have time to read and have my best performance. I spent a month studying SAT and I took the October SAT. I score around 1400 on my practice test, the lowest is about 1350. Can I score more than 1400 on the real test? I feel the grammar is easy, but I ran out of time on the last reading article (which is so easy! But i just guessed on half of them…) math is okay for me. Please help!