Convertor gurus enter

Ok my car still needs dyno time eddy headed 408
Question I have a hughes 3500 in it on the dyno it's flashing at 4200 . Does that mean its on its way out?..or is it a bad batch of converters. My buddy said its hurting hp he said I might want a tighter one so I can get more operating rm out of it. Some insight would be much appreciated.

What size is it? And Hughes make decent converters,for off the shelf. How about calling them,to tighten yours up? It can be done,depending on the actual converter core.