Found: 66 SS 396 Chevelle

[BBIGG BLOCK 396]

There is one on the top of the frame at the rear wheel area,pull the rear wheel on the driver side,take a mirror with a handle and you should be able to see it.You may have to clean dust or dirt off but there should be one there.Not sure as far as the body goes but I bet there are somewhere. I had someone tell me before on the inside lip of the trunk on the driver side under the rubber gasket there is one but I never seen one there. Says it is stamped in the metal in the groove about 1 foot from the top edge right in the groove!