440 values

I would bypass the .060 over block. Have you seen the engines?
Forged or cast cranks?
Can you check to see how far the pistons sit in the bore, if they were truly bored out or just honed and look at the bearings before buying?
No cam or lifters?

Unless receipts can be produced I would say $500.00 to 600.00 if it happens to have a forged crank.