Looking for advice/insight on car

Yeah a 383 needs a good torque converter, my runner weighed 3035 with me in it and had similar setup even 4.30's and m & h race master tires and I went from a hemi converter which is about 1000 over stock to a real 3500 TCI converter and it dropped from 13 flat @ 106mph down to 12.40's @ 114mph it was truly a dog outa the hole but hauled *** after the 300 f mar my 60 ft dropped down to 1.6's form like 2.10's makes a big difference in bottom end power.