Question regarding Vin body style body code letter.

Given this is a Canadian car and US publications on manual etc, what does 63L designate, attached is photo of door tag which matches the body tag under the hood on the firewall ( actual vin) Car is indeed a 2 door hard top, appears all original drive train, 289 2V C4 trans and 8.75 axle frame and torque boxes are real nice shape condition


Regards Marv
I have a 71 Mercury Cyclone Spoiler, so this L is stumping me