Norm,
It is usual for a plane to roll to the left. It is called "P" effect. The torque of the engine and the swirling air (slipstream) around the fuselage hitting the rudder cause this. Holding some right rudder and/or adding right thrust will help. Also applying the thottle smoothly will keep the plane from jumping on takeoff. Try a few taxi passes and adjust the throttle and rudder inputs to the planes needs. Also try an APC prop. You are probably taking off at or below stall speed.
EXCAP232