I'm thinking about buying a 1948 Lincoln 4-door that has the V-12 swaped for a rebuilt 1949 331CID Cadillac V-8. Trans is the original Lincoln 3-speed. The seller has the V-12 (which is damaged) in a crate which goes with the car. It's an older restoration and really nice cosmetically. What percentage of the value is lost with this swap? Any help is appreciated. Thanks