Well that's not Billys Chevelle...
That buildsheet is Homemade,and is not even typical to this vehicles options.
He picked the wrong Plant & donor car to assimilate for this Chevelle.
He made some fatal solid lifter specific parts character errors,but the most obvious to me is he forgot to list either the C-O5 or C-O6 Convertible top RPO code in box #107.
In box #11 he has the HARDTOP open frame code showing.
Box #79 is particularly pertinent to a convertible built at the Baltimore plant,and this one's not even close.
Red Flags everywhere guys..