Old 383 block sat for 30 years: What do I need to do to check if it is good?

[XH29N0G]

I have an old 383 engine block built in 6/67.  I traded a manifold for it in 1982 or 1983.  It has been disassembled and sitting in my garage for the past 30 years and is rusted.  I would like to know if it is any good.  What should I do or ask for have it checked out?

The outside is rusty, the gas pump cam is rusted in place.  The cylinders do not appear to have rust inside.

Thank you,

James

[c00nhunterjoe]

Take it to a machine shop