Lionel, there is a great Tech Tip about how to build an engine dolly for our Stovebolt engines. It produces an outstanding dolly that can be used in conjunction with an engine stand for increased safety.
Consistent with the safety reasons that Jerry and others have stated, I do as much work as I can with the engine on one of these dollies instead of the engine stand for both tear down and assembly. Doing so allows you to limit using the engine stand for just tearing down or building up the block itself with everything else being done on the dolly. This includes the head. Removing or installing the head on the dolly is accomplished much more safely than doing it on an engine stand.
A Stovebolt engine short block weighs about 325 pounds, but that's deceiving because of how long these engines are.
Matt