I think the more appropriate question is, will you have school during that time period? Because regardless of what you may want to do, you'll be very limited with the amount of time your classes and school exams will require.
I'll assume that you have school and don't have 12 hrs a day to study step exclusively. If you don't have then psai is kinda right, do FA as many times, do uworld twice, and pathoma atleast 2-3 times.
But if you have school, that's not possible. So I'd suggest studying the relevant sections of FA and pathoma for the block that you're doing at school. Several people at my school, myself included, started devoting the first 2 - 3 hrs of our day to exclusive usmle studying after spring break.
Other things you can do are that you can get microcards and pharm cards and start doing 5 cards each everyday. But if you do have 4 months of exclusive studying, then honestly the MAX you need is 8 weeks. Maybe 10 if you really stretch it. You will burn out otherwise. In 10 weeks, uworld can be easily done twice, FA can be done 3-4 times, and pathoma can easily be done 3 times. Also keep in mind, people plateau at some point. What everyone else was saying (in a rather sarcastic way) was that 4 months is unnecessary (atleast 4 months of exclusive prep with no school).