While recently restoring my 69 SS chevelle convertible 4 speed, I found a card wraped around the spring under my back seat. Some of it was destroyed. The card measures 7 1/4 x 3 1/4 and looks like an old time card with holes punched in it. Along the bottom there are numbers ranging from 1 to 80. In the center are just rectangular holes punched in it. In the top it say's (in separate colums) SEQ.-TRIM 079717 ,BODY-NO. 61359, INSP. SEQ.-NO. 918 , C 2, OPTIONS it say's nothing, STYLE 13667, TRIM 788. The original 396 engine was unfortunatly gone long ago & now has a 454 in it. How can I translate the punched out holes above the bottom row of numbers into something I can understand? Mostly I would like to know the original engines horespower rating.