Replacing SSDs with larger ones. Best strategy?

I have a couple of early vintage 64GB SSD drives in a RAID 1 configuration. They comprise a system disk.

 

I am replacing them with two 160GB drives, and I intend to use the same RAID 1 configuration.

 

What is the best way to back them up with Ghost 15 such that I can then restore them to the new larger disks and expect them to boot up?