'61 Valiant - Should I restore it?

Leaving for Omaha tomorrow to pick this one up (they had the model year wrong): 1962 plymouth valiant for sale by owner - Carter Lake, IA - craigslist Floor pans are rusted and engine doesn't turn over but the car appears complete, body panels are still solid, and price was right. It was a North Dakota car. It will be a parts car for my '62 coupe if it turns out to be too far gone. Thinking I will pull the plugs and try a rust product followed by some Marvel Mystery Oil to attempt freeing up engine. Shop its at said they had a socket on crank but thought I heard they didn't come with a crank bolt from the factory. Don't know if its a 170 or 225. If a 170 a hyperpack would be fun, given I could find the parts, 4-speed would be nice, too. I do like the push button tranny, though, and its a 4-door so might just restore it to original.