Bob,
What about the casting date on the other end of the block. It is A286 (28.Jan.19?6)???

I thought it was a Vette engine because of the long oil pan and the short water pump.
Maybe the block has been in a Corvette to replace a broken original block?
Does the small collar inside the end of the camshaft mean that it has been connected to a manual transmission?

If the block is bored to .010 oversize what is the c.i.d then?

What does the power pack mean? (Cylinder head number is: 3884520)

Jani