That would put way too much stress on the fork crown/steerer area. At the very least, clamp the top of the fork blades.
mudboy makes a very good point, here. When straightening forks and/or frame set, I do not pass stress through a brazed or silver soldered joint. All stress is restricted to the tubing.
And that is why this thread is so good. By pooling our collective efforts and ideas, who knows what will result. I am going to keep my eye open, for do it yourself frame bicycle repairing tool material, when I go to the Dump, from now on.