I suppose some people are happy with just a lap belt, while it may cost more I will go for the 4 points in a Cobra.
As for the "open" vs. LSD question, I think the OP needs to narrow the responses a little by targeting this to the BDR forum. Seeing as how a stock BMW E36 differential would not equate to an "open" differential by 1960's Mustang 9" standards (or even 1979 Fox Mustang standards).
TB, I was just telling Ron the other day I would like you to drive our next demo car and see what you think ... especially since the MKIV proved a disappointment for you to stray