This isn't an ideal situation but it could benefit you in terms of peaking correctly. I was always on the opposite end of the spectrum coming in to college XC with 10+ 100 mile weeks under my belt and I would usually run really well for the first month and then get hurt or totally fall apart.
There are a couple of factors that will determine your success after your 267 mile summer:
1. You need to stay healthy from now on. In my opinion this will be your biggest barrier to having a good season. Consistency from now through the end of the season is important and you don't have a big base to fall back on if something goes wrong.
2. You need to mentally handle getting dropped in every workout for the first half of the season. It is essential that you don't get caught up in racing in workouts. Your fitness will come along but you are way behind your teammates at this point. However, this may be a non-factor if you are way more talented than your teammates.
3. You need to communicate with you coach regarding your situation. They need to know you aren't sucking in workouts and early season workouts from lack of effort, rather from coming back from injury/illness. Unfortunately, most college coaches won't care and the big downside is you will likely not get to go to many meets early in the year.
If you build consistently from here, stay healthy and get an opportunity to race later in the season you may peak perfectly and few a couple of great races come late October/early November. At the end of the day if you run well then nobody on your team will care how you did in August/September. At the end of the day conference, regionals and nationals are the only college XC meets that count anyway.