So i finally finished building and installing my new motor in my '03 mustang. Went to fire it up for the first time and initially the starter couldn't turn the motor. After rotating it a fews times by hand and trying again we finally were able to get the starter to start turning the motor. However the it doesn't spin nearly as fast as it normally would and the motor won't fire. Any thoughts? Could it be the starter doesn't have enough torque to spin the motor fast enough?