A-904 shift kit

getting ready to tackle the valve body, I want firm but street able with the auto function, I do have a full ratchet shifter Hurst pro-matic2. as well. from what I have been reading , is the best shift kit to go with the Trans go TF-2? and does anyone ever change the springs in the governor as the 727 for higher shift points to make a difference to match the valve body? I
am planning on a 9.5" pft converter 2500-2800 stall. 3.5 gears