5-8 weeks of full-time study could be sufficient to get a 170+ score, assuming a high level of English proficiency prior to LSAT study.
LSAT success is also a matter of practice. Even for someone who regularly gets 175-180 during practice tests, it's still possible to get a score no higher than 170 on the real test
You'll never get there if you don't plan to get that far, and you are just scared, you don't even have the hallucination. Besides, asking here don't help anyway. The only thing I can ensure you is 5-8 weeks are enough for a thorough preparation. 150?160?170?180?A matter of faith. I'll take 6.7's too. Why don't we crash ourselves, or you just cry for that otherwise. BTW, enjoy yourself, life is a box of chocolate, you never know what you'll get. You might find more fun in it.