[Canuck]

Oldsmobiles are impossible to verify without some paperwork. Unique to the w31 are the balancer,intake and carb. Heads are identifiable internally only.
As far a price is concerned I have seen the following ranges. $15-20,000 for documented restoration projects. $30,000 for documented #2 condition cars(nicely restored but used since restoration) $40,000 to $45,000 for documented #1 resto's. Everything else is just a Cutlass without paperwork. Interest in these cars are increasing,but you gotta prove what it is. Any more info you can provide on this car could help with your decision. I have not owned any w-31's but have known a few through their restoration process.