I'd go to ebay and do a search on the car to get an idea. In my opinion if the floors are good and it's an SS 454, or for that matter none #'s matching, i know it came with a turbo 400. I would think around $10,000.00
We will be finishing a 72 nova in the summer, none #'s matching, with everything new or rebuilt, think i'll start the bid on ebay around $22,000.00. Last summer i sold a 55 Belair all new none #'s matching for $37,000.00 on ebay and made a couple mad because i had a buy it now price at $38,000.00, but sold it locally. It's now on TV in a couple commericals for a local advertising company
JMO
Zip.