I am concerned about IPv6 traffic infiltrating my network before I'm ready to accept it. Do I need to configure an IPv6 ACL to deny any any IPv6 traffic if I'm only using IPv4? Can you have both an IPv4 and IPv6 ACL configured on the same interface?
Do you even have ipv6 unicast-routing in your configuration? If no, you don't have to concern about IPv6 traffic. You can apply IPv6 ACL on the IPv4 interface, but they are not going to do anything.
Here is a reference on how to do IPv6 ACL