CDV117856 engine Vin code

Guys , I have this 454/468 BBC I got a few years ago. It was a very very strong motor in a absolutely totaled 78 malibu. It was driveable, but not streetable due to the whole right side of the car was mangled. This car ran like a dog on fire (I drove it once) and the story that surrounded the car supported that. now Im thinking of selling it in favor of building a FI roller 454 for my 57. Problem is the only number on the front pad is CDV117856. This does not seem to follow any format I can find. casting is 14015445 with what looks like date code H268. Im thinking its a 78 454 maybe 4BM. Anyway any of you that can explain the CDV prefix would help. I just cant find this format.
Attachment 54398

My guess is if there is no casting numbers at the front of the block
behind the timing chain, this an aftermarket cast block.
I don't know all the companies that have done or still do it.

World Performance // Bill Mitchell
Dart
MoTown
Maybe RHS?

Does it have aluminum heads or iron heads?

pat mccarthy may chime in with more help.

no it not a after market block i had many of every ones blocks at one time . it is a GM block that pad number could say some thing i am not a stamp number guy. as there been more then one engine that was not what the pad number said it was by re building it. to some thing more Hp then stock. could be a number from a truck or marine use as well as a crate number . or ??? most of the time that number gets cut clean off when a deck a block i seen many number that look like that on 454 truck engine blocks ? if a older engine i will ask customer if he needs the number s for the build before they get removed no one could help you on the shoe box forum?