Build sheets can be found just about anywhere on the car. Most common location is of course on the fuel tank. They have been found under the rear carpeting, in the seat backs/bottoms, behind the dash(speedo/tach cluster), you name it. There have been several found between the rear strut rod bracket and the bottom of the differential(in some'78 cars, anyway). It's possible the sheet is gone, regardless of where it was originally put. For instance, in '74, there was a recall for a faulty vent tube on the fuel tank. If the car was repaired under warranty/recall, the sheet was destroyed in the process. But there might still be another one in the car somewhere...ya never know. I've had my '74 completely apart, and the only place I found any evidence of a build sheet was on the fuel tank...I could see where it
used to be....
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Joel Adams
C3VR Lifetime Member #56
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"