Sounds kind of like my 389. I paid $2500 to get it rebuilt but that doesn't include the intake, carbs, headers or ignition. I have over 4 grand into it with all that stuff.
Here's the invoice
__________________
Robert Lewis
1959 Star Chief 4 Dr HT dual quad 389 4 speed
1962 Pontiac Plain Jane Catalina
http://pontiac-59.com/