It is very sloppy in the valve body support. I'm already using a extra tall seal to move the sealing surface on the shaft. Also machined the shaft smooth (pat Blais) So the play is either valve body or worn lower part of the shaft.
I'm making 420hp (crank) just got a custom built Frank lupo dynamic converter as well. Always seemed to shift well hence my question about checking if a kit was already installed in this trans.