well the cc503 no issue. the torque converter with lets say a 3500 stall should be fine as long as your not haul %$^# to the area. the cc503 is a good DD cam cause of the low end torque for driveability around town. with a 3500 stall you should have no problem on the highway, probably end up sitting at 2200 with stock gears. the only real time when a torque converter heats up is doing a brake launch or always in the throttle. so basically your fine.