I’m still fairly new to my ‘95 Cobra (got it 4/4/20) and I’ve done a good bit of mods, repairs, etc. car has 90k with stock rear end (as far as I know) so probably 3.08’s. I’m fine with the gearing for now but I’m a bit of a “preventative maintenance “ kind of guy so I’m wondering if changing out the rear gear oil(75w90) wouldn’t be a bad idea? And in my research, I’ve come across various rear diff covers. Do these SVE and Ford Motorsport covers really make a difference?