VS on https with offloading and pool on different port non ssl

Odaah is correct, you need to do this with a standard virtual server.

If I understand you correctly, you are trying to do a port 443 to port 7003 conversion? And the 7003 connection should be unencrypted, correct?

If this is the case, you will need to create a pool for your servers using port 7003. Then you will create a virtual server using you VIP IP address. This services will listen on port 443. You'll need to assign it a HTTP profile, and then assign a client ssl profile with the certificate you want to use. Make the pool you defined above your default pool. Do not assign a server-side SSL profile.

This should get you the 443 to 7003 port conversion with no encryption on the server side.