[Mark_C]

I'm sure the hood that was installed on it orignally was a prototype that was used to develop the production version. The sheetmetal shop must have had one or more mocked up well before it reached the RPO stage. Plus the assembly manual is just the instructions for assembling it onto the car, not the engineering drawings to have the hood actually stamped out and assembled by whoever produced it for GM. The one on the 68Z may have been one of the batch that the production stampings were made from, or just one used in the engineering and design shops at GM. It's a fiberglass hood now, don't know if it was originally a fiberglass, or a steel hood. Either way I would expect it to be considerably different than a production 69 ZL2 hood.