You might want to take some before/after data when you install the 3Kgsk kit. I did so and found my boost (WOT) at 1500 rpm decreased from 15 psi to 11 psi (95 5 spd).
It turns out that instlling the 3K gsk can modify the gov arm/plate relatioinship. It was necessary for me move the torque plate (original plate) forward . 020 in order to regain my original rpm/fueling status. You might want to take several data points. I checked at 1000, 1500, and 2000 rpm and in every case, boost was about 4 psi low before plate adjustments were made to compensate. Now, with all corrections made, I am pleased.
Rog