How to make your own locking gas cap

66plyValiant said
around here theres a place called canadian tire that you can get locking gas caps and many other parts cheaply over the counter for an A body, $20 for a locking gas cap.

Sorry, part numbers, please, or it didn't happen. Canadian Tire does not have gas caps for pre-mid-'71 A-bodies, at any price, and hasn't for years.