[rotorwrench]

The smaller the fastener, the more stress on threads. I've seen many a model A motor hanging from a single spark plug thread but they have the 7/8-18 or 18mm set up. The model T is pipe thread so a person could get one or two from Lang's or Snyder's that have the adapter for the model T spark plug bores. If the head is off then several head bolts can work with the right chain links. Once all the bottom covers are off then the engine can lay on a table or fit on an engine stand with the right combination.

The early Ford V8 engines use an adapter that fits the exhaust ports with all bolts in for mounting on a roll over stand. One or two outfits fabricate the adapters but I fabricate my own stuff. The 4-bangers have the valve chamber on the right side so this doesn't work well on them. Where there's a will there's a way.