As mentioned above not likely to pick up a great deal of hp but torque will move up for sure. Should improve in the 60 foot however may not see MPH increase much more than 1 mph unless your converter was leaving alot on the table. I would guess .1 to ,15 increase. Maybe more depending on how the converter likes the converter changes. FWIW I have had best luck just getting a new converter as opposed to tweaking old ones.