Nice car. If you post your serial number and the numbers from the trim plate under the hood on the firewall someone here will tell you the information.

7 = year = 1957
2211 = model number = Pathfinder 6 cyl ( 261 cu.in. ) 2 door sedan, 6 passenger.
631429 = consecutive production number ( started at beginning of year with 600001 and went up )

list price = $2539
weight = 3220 lbs
Oshawa built