That's a very large export file. You're going to run into memory limits both here and on a self-hosted site.
My first recommendation would be for you to try to find out from Blogger if you can break up the export file. They don't seem to make that available by default but it's possible if you post on their help forums someone will know how to do it. If you could make that happen, it might be the most successful outcome.
If not, you can make the file available to us (uploading it to Dropbox or a similar service would be the easiest way) and we can try to import it on our end. There's no guarantee the import would succeed, especially if there are a lot of image files, but we can give it a shot. From there, if the import worked, we could then break it into about a dozen export files you could import into your .org site.
Let me know how you wish to proceed.