I'm shooting for no less than a 170 on my final LSAT Exam.
This is problematic thinking. Don't go into the LSAT with a preconceived minimum score in mind, it's just not the way the test works. You could study for ten hours a day, seven days a week for a yera and still not score 170. The LSAT is not a test that allows everyone to achieve a 170 as long as they put in the blood, sweat and tears.
As Loki stated, it tests aptitude. That means, to put it in the simplest possible terms, you either have a 170 inside you or you don't.
Can you improve your score from 149? Absolutely! I would be willing to almost guarantee that your score will go up. The LSAT is a test that you can learn and improve upon, but with limitations. Is it even possible to go from a cold diagnostic of 149 to a real score of 170? Yes, but it's highly unlikely. T
hat's why it doesn't make sense to say "I'm shooting for no less than a 170". It's like saying "I'm shooting for no less than the NBA". Don't put that unnecessary pressure on yourself. I have a friend who scored 174, and I think that even his diagnostic was something like 165.
The best thing is to take a prep course (if possible), put in serious, dedicated study time, give youself every possible advantage, and shoot for the best possible score. Maybe it will be 175, maybe it will be 155. Either way, it will be the best score that you are capable of getting.