I did business with SMR in the past. The owner was a drag racer of some note, travelling up and down the East Coast. We sold him performance shafts, drums and other hard core race items for the TF 727 and 904 transmissions that the we made. He knew his stuff. Unless things have completely changed, I wouldn't hesitate buying a converter from him at all. Just make sure you answer truthfully any and all questions about your combination when and if you order a converter. Give a converter builder the wrong information and you will be disappointed in the results.