Got a rear years ago, was told it was an 8 3/4 from a 71 Charger and was told it would fit perfectly in my 71 sat.

Pictures are here. http://s2.photobucket.com/user/shirowfan/slideshow/Rear

Pictures are after it soaked in Trans fluid for a month.

Would it be safe to run with the pinion rust damage I can probably clean it up with some light 400 grit hand sanding.

Any info is appreciated. I'm out of my league with rear/trans stuff, have no idea what I'm looking at.