One word of caution - Double check your ACLs with the "log" option or
a sniffer once you configure them:
We had a pair of 6500s (running hybrid 8.3/12.1(13)) in my office that
were setup for inter-vlan routing. I added a few extended ACLs to the
SVIs on the MSFCs and I noticed the ACLs weren't filtering traffic the
way there were supposed to be (letting denyed traffic into a SVI but
blocking the return path even though the ACl wasn't performing any
egress filtering). I always assumed applying an extended ACL to a
6500 SVI should behave the same as if you put the same ACL on the
physical interface of any other IOS box.
After talking the issue over with TAC some of the older IOS versions
don't appear to handle filtering properly. You probably won't have
any issues but I'd double check the ACLs are blocking everything
they're supposed to be blocking.