Hi Chris
I've also got a 71 1302LS... only my S has snapped off my badge
🙁
The S was the 1600 twin port version of the 1302.
And the L meant that it had things like a flip anti-glare rear view mirror, pop out rear windows, padded dash and I think it also had the 2 speed fan which wasn't avaiable on the other 1302 models.... until '72.
Unfortunately time has not been kind to my car and it no longer has any of the L accessories!
As for the actual meaning of the L and the S sorry I don't know, you may find something here
http://www.1302super.com/
I have only found references to cabrio's when websites talk of 1302LS's.
Cheers
Jeremy
......random gibberish for today.......