[CentOS] squid HA failover?

I'm running a pair of squids as an internal cache for some intermediate data used by a web server farm and currently doing failover by going through an F5 bigip. However, I'd like to avoid the bigip and use heartbeat since there are only two machines. I don't need to sync any content since it is a fast-changing cache and either machine can handle everything. Is it possible to add a floating IP with heartbeat and cut over to it slowly while also still using the existing IP's on that subnet? The documentation I've seen implies that it is bad to use the real IP's. If heartbeat can't do this, would it work to use vrrp?