Make sure the kick-down cable is adjusted properly, seems that as they wear they don't pull the lever back as far as they used to, almost every trans I re-build for these needs the cable tightened up to get it where it belongs afterwords. We also do it with a tranny service and most of them need to be a little tighter also. With a loose/worn setting it will let the trans shift a little earlier than it should as well as softer than it should, lots of worn tq flights shift way better after a trans service including band and cable adjustment and I always turn the line pressure screw about two turns more pressure to compensate for a little lost tension over the years. None of this makes higher than stock shift points but rather makes sure it is at least right before you go to altering things.