need help with casting # at dist hole a c then belowedb
 left sid near core plug  ther isedb6016 aftr the 6 a# or/ not legible.
i was told the block was from a 1957ford car,bore is std with some wear  and has the hole for the early base breather is open crank is std .

Any help would be apresiated. cliff at ct1940@shaw.ca