[Dragsinger]

With my specific need, while on the dyno, no pulleys are installed and the flex plate is inaccessible because of the dyno mounting.

Because of the heavy valve spring load, I do not like the "feel" of the 7/16 center bolt. The above tool will work perfectly in this situation.

This dyno does not allow the engine mounted starter to fit, it has it's own starter and does not "bump" with the control as well as the engine mounted one.

The above tool will let me utilize the above said long ratchet.

And as stated above, in my experience, "bumping" the engine mounted starter is completely acceptable.