The package may include thousands of nodes that can potentially create memory issues.
- Do you see any relevant error message in the "error.log" file ? Any Out Of Memory error ?
- If so can you increase the allocated heap to AEM by using the proper size in the startup command ?
Example: java -jar -Xmx8G aem64-author-p4503.jar
Check whether that package is already there in packagemanager or not .If yes then delete it ( uninstall if required) .
Then again upload the package .Once you upload click on install you will get a pop-up where you can see advance settings there change the value of save threshold default 1024 to some 100000 and install the package.
Give a try .
There might be an issue with network or tmp disk space. Make sure the tmp disk space is double of the size of the package.
Alternatively, you can also try VLT-RCP tool https://helpx.adobe.com/experience-manager/6-3/sites/developing/using/ht-vlttool.html