I posted that my car does have a swaybar. It has no washer on the K-member.
Looking around, I noticed that the passenger fender was replaced since it did not have undercoating and the part number is plainly seen. The rest of the car is undercoated. The front frame rails are painted orange (faded) and the K-frame has areas that are painted black (faded). There are white "X"s that were painted (epoxy paint pen?) on the K frame where it is bolted to the car frame. The valance between the bumper and the grill is in excellent shape and the part number on the backside is plainly seen. The bumper is bent up in the center but it has excellent chrome with no pitting or oxidation spots.
Based upon an obvious replaced front fender and the fact that everyone else with a 71 340 seems to have the washer on the K-member, I am now leaning towards a replaced K-frame.