I don't think so and don't recommend it. You will learn a lot about what you had running on your 4.9 system if your not meticulous. IMHO- Wait for 7.1-RELEASE. During this time try to document what's running on your system now. Backup your system so that you can restore it from bare metal. Bare metal means you have a working PC that does not boot.
Or you could cheat, something I have done. Buy a new disc drive and install you new system. If you get into trouble mount your other drive read-only and use it as a hot backup (in addition to your real backup). -IMHO