451 stroker rear gears question

well i put the 3:23 s in,car is much better loads the engine up and pulls hard now,converter is too loose though still flashes to 4000,i,ll take it back to the strip and see what it does,because i dont think the converter will affect strip performance at all,just a bit loose for the street,only miled an hour at 106 before with the 4;10s so hopefully now it,ll get 120 or or so ,we,ll see what happens