For the 1988 and up 700R4 for Street/Strip use, I combine the TransGo Junior and the 700-2-3 to get the best of both worlds. I modify the kits to do what I want. This way I can have the smooth part throttle shifts, quick downshifts and quick WOT shifts. In all of my Shift kits and rebuild kits I use the matching Shift kit or kits, boost valves, accumulation, Corvette servo or Sonnax if needed and the correct feed hole sizes in the separator plate to match torque diameter and stall, rear end gear ratio, how you drive, use of vehicle, etc. I have been using TransGo Shift kits for 39 years now in all of my transmission builds with very few problems. I have sold well over a thousand 700R4 Shift kits and rebuild kits in the last few years all using TransGo Shift kits and line rise problems have been non existent. Since I do not use Superior or Fairbanks valve body kits, I cannot comment on them.