For emergency flat tire changing on the side of the road I found an 82 to 92 Camaro/Firebird spare tire jack in a junk yard. They are low and flat and fit under the frame mid body between tires. They have the typical bumper jack ratchet bar but is horizontal and jacks apart two pads, one on the ground and the other under the frame. They weigh about the same and fold down to fit behind my spare in the trunk like the original bumper jack. Safer and less damaging than bumper jacks as it picks up the car by the frame at mid-point.