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i know on C4's we are able to purchase our build sheets, but on a c3 what do you do? I just dropped the tank in my 71 and there is no build sheet or any indication it was ever attached to the tank. How can you verify that your car is a big block car if the #'s don't match?
....How can you verify that your car is a big block car if the #'s don't match?
You can't. Not without other substantiating documentation. An original smallblock Corvette can be built into a big block car which, from every aspect, could appear to be original. Do you know any of the previous owners? You could begin your documentation search with them.
Good point on the absence of the tank sticker. Lots of folks go looking for one and don't find it.