I bought a set of 3 jaw gear pullers, 3", 4", and 6". Tried the 4" first. The jaws bent the edges of the pulley and one of the bolts to one of the jaws broke (I didn't realize that the bolts were so loose, should have tightened them a little first). Then tried the 6". Again, bent the edges of the pulley. Pulley didn't seem to budge and the center bolt on the puller split the pulley shaft on the tension arm. I thought it would have been made of stouter stuff. So I'll call in the morning to order a new tension arm if I can't find one online first.
I think that the inner sleeve got too hot and at least partially welded itself to the shaft.
At least I managed to change the ignition switch. Will test it once I've gotten the rest of it put back together.