So, the way I would do this....
If I presume you're going from v10 to v11 (as you've not mentioned this). You can import a v10 UCS file into v11. So, build one of the hardware devices with a base configuration (network settings, self IPs etc.) and then import and restore using this UCS file. You will need to use the no-platform switch though, and the no-license one too. This should hopefully get you a duplicate of your virtual on the hardware device.
Then, do a base build on the secondary appliance and then go through the normal clustering procedure, this will copy the config onto the other box.
Hopefully I've not missed anything key.
Hope this helps,
N