Now check this out. Here is a guy selling a 678 block on ebay and has "MO" in the description and it's at $902.00. No picture of an MO stamping, no casting date, no nothing.
There is a thread on here before this one with a 678 block for sale and he only wants $75.00. Go figure.
They are the SAME block. 2 bolt block used in the 302-350 engines.
Jeez, what is up with people selling these parts???
I should pull the 657 block out of my 67 RS and sell it as a 1967 302 Z motor. Yeah, that's the ticket.
Rick H.