Hi i am new, and have a super stock spring question.

Hi my name is Dwayne and i have q 68 dart with a 360 in it. ok, here it gos. little back ground. The 360 is stock but have big cam in it(305h crane) and have 3000 stall plus 3:91 gears. my best time is 13.43 @ 99.98 at track.Ok now question. when i leave at the light the cars left side lifts hard and pulse when i go down track. soon as i let off it drops and shoots left. do i have the supper stocks in wrong???? .just woundering.