THe first "AUTOMATIC" car I ever drove was a Bat roof 61 Strato Chief 4 door .. It would almost do 90 MILES PER HOUR... I watched my Dad restore the floor with tin snipes, pop rivets, sheet metal, and TAR! My Dad ran 2 for $25.00 winter retreads in the rear .. Wish he was here now to see my car Kudos to you for restoring the family car more history saved....
I can't say how many were made (perhaps GM of Canada Vintage Vehicle services could help you with that) however I can tell you this much: You car is model number 7119 They cost CDN $2905 when new (base model) They weigh 3770lbs Serial numbers for your model and body style start at 0711900001 so if you look at your SN, you can determine how far along in production your car was built. Todd