Its not the plate that makes them flimsy, its the narrow bellhousing bolt pattern the arms have to be adjusted to. The pic in one of the posts above that has a piece of flatbar used to move two of the mounting points outward is a better solution for store bought stands, and makes it a bit more rigid. My adapter plates uses all 6 bellhousing bolts to affix it to the block. And if you do a lot of Stovebolt's or GMC's it saves time having from having to change the arms from a different engine bellhousing pattern.
