If it starts overheating in the first drive after bleeding the system, and this is the original water pump (unlikely on a '95), then I suspect that the plastic vanes have crumbled off the water pump impeller.
If it starts overheating after a few driving cycles, then I suspect that the overflow tank has crumbled inside so it is sucking air into the system each time it cools. This cooling system really does not like air bubbles. Tiny leaks in other places can also suck air in without creating a massive water leak.