It may sound extreme, but I would pull the engine to do the head gaskets and do whatever else needed doing while it's out such as replace steering rack, shift bushings, rebuild starter, motor mounts, etc. Like Del, says though, do a retorque first and see what happens. That's only about a 3 hour job or so and see what happens. Do a valve adjustment while at it. Likely the exhaust valves will need adjusting.
Are you sure you have antifreeze in tail pipe and not just condensation? Does tail pipe continue to have steam even after engine warmed up?Thanks all i will try the retorque on the heads, how bad can the heads loosen? I have antifreeze dripping out of the exhaust when running can it be as simple as a loose head? and the car is a 1991 alfa 164L with a 5 speed and it has 130,000 miles.