iscsi guest clustering NIC question

Hi,

We have 2 hyperv servers configured with failover clustering. At this moment
we use 8 NIC's
1 for management
2 for iscsi storage
2 for virtual machines network
1 for CSV
1 for heartbeat
1 for clustering.

Now i have to setup two clustered virtual machines. I understand that this
is only possible with iscsi storage.
What are my possibilities to connect to my iscsi storage in the above
configuration from these vm's?

I searched google and read about placing extra nic's in the server and make
them dedicated for iscsi storage for the vm's.

Can anyone help me on this?

Thx.

Ramon