Back in the family after 30yrs

I am glad you got the car back, I like that you plan just to clean it up.
Don't paint anything, you can rub some rust converter in small area's to preserve it if necessary.
Polish the exterior with really fine compound, old enamel will shine great if you take your time.
Did you get the original block? Just because it cracked does not mean it cannot be fixed.
Good luck