Quote: Scott, I will guess you second pic is six pack too...
You are right about the first one, it's an original 1970 440+6 block from a numbers matching 70 Cuda. However, your guess on the second one is not correct, it's a regular old 440HP block.
Quote: I have only known that you check the vin to be sure of 6 pack
That is correct, and so it remains.
Quote: does anyone know about warranty blocks? Just the internals? If you needed a warranty block for a 6 pack, was it an HP block that you got?
The third photo is a factory Service Replacement 440 Short Block ("S" = Service Replacement) if you blew a 440 under warranty in 1970 (ANY 440) this would have been what your car recieved as a replacement. There was no HP or anything else unique about them.
