I think the heater suitcase is in the way to cut a hole in the firewall. I've made a bolt-on press for a big block head, but, never had the need for one on a small block yet. Any engine or head I've had out of the vehicle always got brass ones from the get-go. If it were me, I'd just put another expandable one back in. Who knows, you may have to pull the head or the engine for some other reason in the near future. They used to make brass or copper ones too, but, if they're not available anymore, just change that rubber plug every year or two.
