It's not a passion, it's called personal preference.. It's people that want to keep their car original. I personally would rather spend less than $800 on a LSD with 4.11 or 3.73 gears than to spend 2k+ on an A-body 8 3/4 with the same GR and suregrip.
NOW with that said, if I was going all original in my car, 8 3/4 would be in the books.
