The block was cast April 27, heads May 15,Exhust manifolds June 7.
The vin stamped in block is the only thing that authenticates it is a L78. There is only one other car that I am aware of & Hemming's Motor news said it was probably the rarest 1965 Chevrolet ever built!
That car has a CE block. Most L78 cars came with 4:10- 4:56 posi. My car was ordered with 3:31 open. It also came with electronic Ign. I think?