The ones I’ve seen on that design work great without casters, oil pan still above floor.
Another option to stabilize an engine is bolt a timber or piece of steel about 2’ to 3’ long to the bellhousing.
It’s wide enough to reduce chance of engine flopping over, and tall enough or blocked up high enough to keep oil pan off floor. The front mount set on another appropriate height block of wood.
48-53 you can easily run lag bolts vertically through the still installed engine mounts (remove tin flywheel cover)
Any year you can bolt the timber or steel angle or channel iron on the back of bell housing with two of the transmission attaching bolts/holes.
Problem with the suggested method is knowing ahead of time what supplies (and their dimensions) to bring if not available where the engine is. Advantage is this is quicker than making a whole stand, and cheap if you have some chunks of wood or a piece of angle iron handy.
