automatic 727 modified / shifting issue?

my factory rod with adjuster came with a shorter version of yours so I recently modified it by buying a section of rod from menards and MIG welded a section into the factory rod and gotten rid of the bolt-nut-washer. dont have a photo its been raining here for a few days . it's all properly adjusted but still having the issue of not kicking down to pass while driving Hwy speeds - 65 -70-75 ect. I stomp on the pedal and can here the 4 barrel kick in but no shift ?I'm wondering if it's the racing shift kit ? the 727 was built by a professional and since it's a racing 727 auto I have to run Type F or b&m quick shift fluid . only . thanks for the pics