I saw those too, Redcar! But the first one's already torn up inside and I was having a lot of trouble finding gears. It was "for parts only", though with the pinion trashed, hard to guess what parts would be useful. The second one was lying out of the car in the rain, and who knows what drive ratio it had anyway. Plus, the guy wanted to get rid of it all, and was "local pickup only". Bummer.
So both of those were a bust.
But the good news is - I found a guy with a bunch of Toyotas, and he happened to have a GTS with the right diff and gear ratio for me! Looks like I'll have the problem solved in a week. =)
Thank you for your help in chasing this down, Redcar. I found a story about the Cressidas too, actually, and spent a couple hours chasing those before I found this diff. I sure appreciate your help, and your advice.