Im building the 4L60E in my cruiser/hot rod truck at the moment. After learning a lot about this transmission from analyzing everything on tear down and the various tuning strategies ive employed on it over the years, plus talking to several successful builders, Ive pretty well got my tune nailed down. However, one grey area I haven't decided on a strategy for is shift timing. Obviously im upgrading the weakpoints and downfalls of the transmission for my particular setup. Some people suggest zero'ing shift times and letting the trans "do what it can do". However, im curious if leaving the shift times alone and letting the shift kit do its job will be fine, or if the pcm will be "slowing down" my shifts after all the modifications Ive done to the valve body, pump, clutches, etc. Ive set my pressure tables back to stock, torque management back to stock (which was pretty conservative in my stock tune, and none at all in normal shift mode). I have done pressure/oiling/clutch modifications to handle high rpm shifts, so I'll set my performance/tow haul mode up for fun driving and leave my normal shift mode fairly stock for cruising around. Converter will be set to unlock at anything over 80% throttle and the trans will not be set to shift into 4th at WOT. So with all that in mind, would I be better off to zero my shift times, or set them to something like 0.150-0.300 based on desired shift feel?