I just had to figure this out for myself on my 69. I used information provided in the AIM book. You could see drawings on those items & there was verbage that went with them. Never any part number so on would come to the conclusion that these parts were on the engine when it was built at the engine plant. My engine code is CJG which was stamped at the engine plant. I think it would've also been written on the side of the block to tell the builders what components made up that build. CJG was 396(400) w/th400. Same with the battery cable clip. Does that make sense? I did find other like pieces from other engines I've taken apart. They didn't have paint on the backsides. Other years could be different....Joe