Need help & thanks in advance. I will try & be as precise as possible. I am looking at a 65 gto for sale with a non matching 400 out of a 1971. The car has the cowl tag under the hood & phs paperwork but no vin tag on the door. He is asking 40k. How much does the no vin tag on door depreciate the gto if phs papers & cowl tag are present? I'm thinking I should run!