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This was a condition I experienced too. It appears to happen on the return line on mine. My car has AC so there are two lines. I have heard others call this "the Riviera rattle" I fixed it by loosening the back two clamps and putting about 3/4" of clothes washer hose split to go around the fuel lines and tightened the clamp screws. This provided for more insulation and therefore less noise. I notice it most when it a little cooler in the spring or fall, and most right after starting the car. The sound is still very faint but I think I am the only one that hears it - passengers typically cannot. Rock On gord

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Ed it may be a little bit of a chicken and an egg question. In a unibody car (like today, although there were unibody cars way back in time too), because everything is fastened by a weld, body mount cushions are not necessary to isolate the body from anything. As you know there are body mount cushions on engine cradle attachments on unibody cars. Isolation in other vehicle systems is achieved by the use of other cushions and bushings. This manufacturing process is quite different than frame construction cars. Cars for many of their years of production had bodies mounted to full frames, and since the body was attached to the frame by a threaded mechanical fastener - a cushion was necessary. This was basically a necessity of the production process. The cushions for the engine cradle or the full frame helped isolate any metal on metal vibration from the body and to a certain extent kept a tension on the threaded joint. I remember, from my time working as a Manufacturing Engineer in a few GM assembly plants, there were different durometer cushions used, and the durometer used depended on the location of the fastener on the car, and also there was a difference between the various car lines and models. In other words all the body mount cushions may not the same on one car or between different cars based on option content or model. Within the constraints of the technologies of the time the different durometer cushions allowed for some differentiation between the different car lines and models on ride sound, perceived tightness and reliability (and likely other parameters). Since rubber fails or deteriorates over time and environmental conditions, a reliability was built into the specification. This would make some of the car lines sound tighter, have less rattles and vibration, and have these characteristics for a longer period of time versus other car lines. That goes for many of the cushions, bumpers and bushings used in other vehicle systems too. The technology of today's materials, production processes, and engineering allow for the cars of today to be better manufactured with tighter tolerances, lighter and stronger materials, more reliability, and therefor they go further, last longer, and require less frequent maintenance (I am not casting any aspersions on all those well maintained vintage cars out there). This has driven much different manufacturing processes and methods used today. So to a certain extent the way the cars were engineered (Frame or not to Frame) and manufactured drove the need for Body Mount Cushions, ergo the chicken and egg analogy. Sorry for over answering your questions Ed. Rock On gord

Ed, you are correct. The stock configuration was two clips per side of the vehicle, one on each side of the decklid hinge horn. For a total of 4. Additionally they were vertically in the center of the horn side. You can see the drivers side clips in this picture. Rock On gord