You're better off going with a mechanical solution (modified valve body), rather than just using the line pressure booster. The VB will actually increase the longevity of your tranny. Whereas, the line booster just increases total line pressure, which may have a detrimental reprocussion on the tranny...not sure, for I don't think anyone has had one of these on thier rig for an extended period of time.
I'm going to be testing out the Paramount VB in my rig...can't wait to feel the results