You can use a distribute list.
Couple of points -
1) If the 6500 and Nexus are connected via a P2P link then you could configure the distribute list outbound on the 6500 to stop it sending certain routes to the Nexus switch or inbound on the Nexus switch to stop it receiving them.
Either would work.
If however the 6500 and Nexus are on a common vlan where the 6500 peers with other EIGRP neighbors then you should apply it inbound on the Nexus because the 6500 would still need to send those routes to it's other neighbors.
2) if you want to filter the majority of routes then you should write your acl or prefix list to only permit the specific routes you want.
If you want to accept the majority of routes then you should write your acl or prefix list to deny the routes you don't want and then accept the rest.
So you need to know which of the above it is.
Jon
