I talked with Dayco and they recommended a part #7732 2800 - 3200 rpm or a #7731 2300 - 2500 rpm with 4.10 gears. These coverters run about $300.00 and they are rollers. The tech dept said the 2800 - 3200 would stall around 2900 with the gears I have. If you do a lot of towing go with the 2300 - 2500. They also said these converters were better built than most aftermarket ones.