[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?

-- 
   Les Mikesell
    lesmikesell at gmail.com