Engine/Transmission (1994 - 1998) Adjustin A # 6 Fuel Plate ???

[SSage]

I've got my #6 adjusted back where my EGT's under heavy throttle slowly climb with good control. I get a steady rise in boost till I hit 90 mph then the unloaded truck pulls much harder and the boost goes from 30 psi to 40 or so very quickly. Is this a #6 quirk? I'm debating on sliding the #6 a bit forward or trying a #10??? That surge would be nice under 2700 rpm. This is my third try. . :{



Any advice???