Hi JBin,
Please post some images so we know what where helping out with. Fixer upper, barn find, nice clean car. All are good. I see in the registry the car was repainted white. What is the color now? Have you seen the repop Magnum 500's? They look pretty nice. Or less expensive Magnum 500's? Do you want the high dollar C6ZF-F carb for automatic or the C6ZF-C for manual transmission or will a 4100 series carb, 600 cfm 1.12 venturies work? Does the car still have the four speed? You might want the Holley 3259. The re-issues will be cheaper. Are you trying to stay period assembly line or ? How important are date codes? In your list, you have near $12,000+ parts to buy. Are your prepared for these expenses?
Best of luck on your search. Patients will be the key, waiting for the right part. Do your homework.
Cory